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ORDOVICIANNEWS

SUBCOMMISSION ON ORDOVICIAN STRATIGRAPHY

INTERNATIONAL COMMISSION ON STRATIGRAPHY

Nû 16

1999

ORODOVICIAN NEWS N¡16

i

INTERNATIONAL UNION OF GEOLOGIAL SCIENCESPresident: R. BRETT (USA)

Secretary General: A. C. BORIANI (Italy)Treasure: Z. JOHAN (France)

Chairman of Publications: W. G. E. CALDWELL

INTERNATIONAL COMMISSION ON STRATIGRAPHYChairman: J. REMANE (Switzerland)

1st Vice Chairman: H. R. LANE (USA)2nd Vice Chairman: A. C. ROCHA-CAMPOS (Brazil)

Secretary General: O. MICHELSEN (Denmark)Past Chairman: J. W. COWIE (UK)

INTERNATIONAL SUBCOMMISSIONON ORDOVICIAN STRATIGRAPHY

Chairman: S. C. FINNEY (USA)Vice-Chairman: CHEN XU (China)

Acting Secretary: G. L. ALBANESI (Argentina)F. G. ACE�OLAZA (Argentina)

M. K. APOLLONOV (Kazakhstan)C. R. BARNES (Canada)

S. M. BERGSTR�M (USA)D. L. BRUTON (Norway)

R. A. COOPER (New Zealand)O. FATKA (Czech Republic)

R. A. FORTEY (UK)J. C. GUTI�RREZ MARCO (Spain)

W. D. HUFF (USA)C. E. MITCHELL (USA)R. S. NICOLL (Australia)

A. W. OWEN (UK)F. PARIS (France)

L. E. POPOV (Russia)WANG XIAOFENG (China)

ZHOU ZHIYI (China)

ISOS CAMBRIAN-ORDOVICIAN BOUNDARYWORKING GROUP

Chairman: R. A. COOPERSecretary: G. S. NOWLAN

Copyright © IUGS

1999


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CONTENTS

Page

Notes for contributors iiiEditor's note iiiChairman's and Acting Secretary's addresses iiiChairmanÕs report 1SOS annual report for 1998 2International Symposia and Conferences

8th International Symposium on the Ordovician System, 1999List of submitted papers 6

9th International Symposium on the Ordovician System, 2003Call for proposal 11Bibliographic comment and invitation 12

4th Baltic Stratigraphical Conference, 1999 123rd International Conference on Trilobites and their Relatives, 2001 127th International Graptolite Conference, 2001 13

ProjectsIGCP Project N¡ 410: The Great Ordovician Biodiversification Event 13IGCP Project N¡ 410: Nanjing meeting (September, 1998) 18IGCP Project N¡ 406 19

Scientific reports Late Ordovician Conodonts from Europe 19Black Shales Facies of the Ordovician of the Cuyo Precordillera 23The Ordovician from Cerro Bola Region, San Rafael Block, Mendoza 23

MiscellaneaStudent Paleontological Society - St. Petersburg State University, Russia 24Comment 24Notice 25Errata 25

Honorary notes 25Current research 26Recent Ordovician publications 37Names and address changes 51Special report

Proposed Global Stratotype Section and Point for Base of the Ordovician System 59

Cover: fossil genera involved in the definition of the global Cambrian-Ordovician boundary: theconodont Iapetognathus, the graptolite Rhabdinopora and the trilobite Jujuyaspis.


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NOTES FOR CONTRIBUTORS

The continued health and survival of Ordovician News depends on YOU to send in itemsof Ordovician interest such as lists and reviews of recent publications, brief summaries of currentresearch, notices of relevant local, national and international meetings, etc. As more geologicalsoftware becomes available, details of this would also be welcomed by many of us. Also pleaseensure the SOSÕs Secretary (responsible editor) be notified of any changes in address, telephoneor fax number and e-mail address.

EDITOR'S NOTE

The present number of Ordovician News is the first one that I am editing as ActingSecretary of the SOS. I would like to thank you all for the many contributions for the currentissue; your electronic files made an easier editing job.

I am particularly grateful to my predecessor in the editing task, S. Henry Williams, whogave me fundamental help in order to make 1999Õs Ordovician News a reality. Special assistanceand technical support were kindly provided by Chris Barnes and Sue Dunlop (CEOR, Universityof Victoria, Canada).

The attached special report regarding the ÒProposed Stratotype Section and Point forBase of the Ordovician SystemÓ by R. A. Cooper and G. S. Nowlan (on behalf of theInternational Working Group on the Cambrian-Ordovician Boundary) was previously printed asa particular report from the COBWG (SOS-ICS-IUGS), March 1999, 28 pp., Geological Surveyof Canada, 3303 Ð 33rd Street NW, Calgary, Alberta, Canada T2L 2A7. The version included inthe present number was provided by G. S. Nowlan.

Because the formal Secretariat of the International Subcommission on OrdovicianStratigraphy will be established in Prague, during the upcoming 8th International Symposium onthe Ordovician System, please do not send any submissions for the next issue of OrdovicianNews until we know the identity of the new editor. Thanks.

GUILLERMO L. ALBANESI

CHAIRMAN'S AND ACTING SECRETARY'S ADDRESSES

STANLEY C. FINNEY GUILLERMO L. ALBANESIDept. of Geological Sciences Centre for Earth and Ocean ResearchCalifornia State University - Long Beach University of Victoria, P. O. Box 3055Long Beach, CA 90840 Victoria, B. C., V8W 3P6U.S.A. CANADATel: +1 (562) 985-8637 Tel: +1 (250) 721-8848Fax: +1 (562) 985-8638 Fax: +1 (250) 472-4100E-mail: [email protected] E-mail: [email protected]


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CHAIRMANÕS REPORT

In a few weeks, most of us will be meeting inPrague at the 8th ISOS. Our organizers, inparticular Olda Fatka and Petr Kraft, havebeen working extremely hard to put togetheran excellent technical program, splendidaccommodations, wonderful social activities,and informative field excursions. I hope tosee most of you there. Prague is an excitingvenue, and the symposium has much to offerall of us.

The Ordovician Subcommission willsoon vote on two boundary proposals. Thefirst is the Cambrian-Ordovician boundary -the last Paleozoic system boundary yet tobe formally designated. The InternationalWorking Group on the Cambrian-OrdovicianBoundary has worked hard since the 7thISOS in Las Vegas. By a majority vote, itselected the Green Point, Newfoundlandsection and Point for the GSSP for the baseof the Ordovician System, as well as thelowest series and lowest stage of theOrdovician. The Working GroupÕs proposalwas recently submitted to the OrdovicianSubcommission for ratification which willoccur by means of a formal postal ballotimmediately following the Praguesymposium. The boundary proposal isincluded in this issue of Ordovician News.Roger Cooper and Godfrey Nowlan,Chairman and Secretary, respectively, of theWorking group, will present the proposal asa contribution to the technical program inPrague. In addition, a Subcommissionmeeting will provide the opportunity forfurther discussion of the proposal. Twocandidate stratotype sections are currentlyunder consideration for the base of theTetragraptus approximatus graptoliteBiozone, which will serve as the lowerboundary of the second stage of theOrdovician System. Proponents of eachsection are presently preparing finalinformation and arguments for their

respective sections. This boundary also willbe discussed at length at Prague; to befollowed by formal postal ballots to select asingle stratotype.

When the upcoming votes arecompleted, considerable progress will havebeen made on defining formal, global chrono-stratigraphic subdivisions for the OrdovicianSystem. The GSSP for the Darriwilian Stagewas formally dedicated in September 1998during a field trip to the JCY area of China,organized as part a IGCP 410 meeting heldin Nanjing. An impressive monument wasbuilt on the site, and its dedication generatedconsiderable local publicity. All importantcandidate stratotype sections for the base ofthe Nemagraptus gracilis graptolite Biozonewill have been visited and evaluated by thetime you read this. Formal voting on thisbiohorizon, which will define the base of theUpper Ordovician Series, will take place inlate 1999 or early 2000.

Subcommission members have beenbusy contributing to IGCP Project 410 asreported by Barry Webby, and manybiodiversity papers will be presented inPrague. In addition, sessions will also bededicated to the GOES project (GlobalOrdovician Earth Systems), headed by BillBerry, and will include a variety of papersaddressing the Late Ordovician extinctionand associated Earth system perturbations.

Corresponding membership will bean important agenda topic in businessmeetings of the Subcommission in Prague.The membership list has not been updatedfor almost ten years. Many who have notbeen active will be removed, and many newmembers will be added. If you are an activeOrdovician worker and wish to be added,please send me an e-mail message or contactme at Prague.

Besides the Project 410 meeting inNanjing, Ordovician workers contributedsubstantially to international meetings ongraptolites and conodonts in 1998. The 6th


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International Graptolite Conference was heldin Madrid in June 1998, in conjunction witha field meeting of the Subcommission onSilurian Stratigraphy. Coordination of thetwo meetings provided the opportunity forseveral excellent field excursions in Spain.Juan Carlos Guti�rrez-Marco, the primaryorganizer, ensured that all participants notonly experienced the geology but also tastedthe culture of Spain. Many papers onOrdovician conodonts were presented at the7th International European ConodontSymposium held in Bologna-Modena, Italyin June 1998. A pre-meeting excursionvisited Ordovician outcrops in Sardinia.

The 31st International GeologicalCongress will be held in Rio de Janeiro,Brazil, in August 2000. The OrdovicianSystem will be represented in two sessions.Gilberto Ace�olaza and I are conveners ofgeneral symposium session entitled:ÒPaleontological, stratigraphical andpaleogeographical relations among SouthAmerica, Laurentia, Avalonia and Balticaduring the OrdovicianÓ. Please contact us ifyou wish to contribute a paper, either oral orposter, to the session. Barry Webby isconvener of a session on OrdovicianBiodiversification. There is reason to visitSouth America again in 2001, when the 7thInternational Graptolite Conference will beheld in Argentina. Gladys Ortega is the newChair of the Graptolite Working Group ofthe IPA and is the primary organizer of themeeting.

Henry Williams provided valuableservice as Secretary to the Subcommissionfor many years. However, because of otherprofessional commitments, he has longwished to be relieved of those duties.During the last year, I appointed GuillermoAlbanesi as Acting Secretary to edit thisissue of Ordovician News and to handleroutine secretarial duties for theSubcommission. I ask all of you topersonally thank Henry for his many years

of service when you see him in Prague. And,I thank Guillermo Albanesi for his finecontribution in editing his first issue, thisissue, of Ordovician News.

STANLEY C. FINNEY

SOS ANNUAL REPORT FOR 1998

1. Name of subcommission

S u b c o m m i s s i o n o n O r d o v i c i a n S t r a t i g r a p h y ( S O S )

2. Summary table of Ordoviciansubdivisions

3. Overall objectives

The Subcommission promotesinternational cooperation in OrdovicianStratigraphy. Specific objectives are:


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a. To delimit and subdivide theOrdovician System (and Period) as a part ofthe overall ICS work to elaborate thestandard global stratigraphic scale. Thiswork aims to establish the boundaries(GSSPs), the correlation of the subdivisions(Stages and Series), and the nomenclature ofthe subdivisions.

b. To promote regular internationalmeetings on aspects of Ordovician geology,especially those devoted to clarifyingstratigraphic procedures, nomenclature andmethods for use in establishing a unifiedglobal time scale, and to prepare correlationcharts with explanatory notes (this lattertask now completed).

c. To encourage, promote, andsupport research on all aspects ofOrdovician geology worldwide and toprovide outlets, Ordovician News andinternational meetings, for reporting resultsof this research.

d. To encourage, promote, andsupport interdisciplinary research on theOrdovician global Earth system, addressingtopics that require high-resolution, globalcorrelation.

4. Organization

Subcommission ExecutiveChairperson, S.C. Finney (U.S.A.)Vice-chairperson, Chen Xu (P.R. China)Acting Secretary, G. L. Albanesi (Argentina)18 other Voting Members92 Corresponding Members

Cambrian/Ordovician Boundary WorkingGroup

Chairperson, R.A. Cooper (New Zealand)Secretary, G.S. Nowlan (Canada)11 other Voting Members57 Corresponding Members

Informal intra-Ordovician WorkingGroups

Conveners of these groups are as follows:(i) base of approximatus (base of second

Stage of Lower Ordovician Series) - S.H.Williams, S. Bergstr�m, C.R. Barnes

(ii) base of laevis (base of MiddleOrdovician Series) - R.J. Ross, Jr., S.Finney, R. Ethington

(iii) base of gracilis (base of UpperOrdovician Series) - S. Finney, S.M.Bergstr�m, Chen Xu, R. Fortey

(iv) base of ordovicicus (base of upper Stageof Upper Ordovician Series) - S.Bergstr�m and C.R. Barnes

GOES Program - research committeeSecretary, W.B. N. Berry (U.S.A.)4 other members

5. Extent of national/regional/globalsupport for projects

Independent support for projectscomes mainly from individual Ordovicianworkers, through their employerorganizations and through individual tomultidisciplinary, cooperative, teamactivities supported by grants fromnational/regional government-funded bodies.SOS receives no formal support frominternational organizations outsideIUGS/ICS. The activities of someSubcommission members (titular andcorresponding) have been supported in partby IGCP 410.

6. Interface with other internationalprojects

The membership of the Sub-commission both geographically and in termsof research interests effectively reflects


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available expertise in aspects of Ordovicianstratigraphy.

The Subcommission has no formallinks with other global projects, though someindividual Ordovician workers are membersof IGCP projects, most notably thefollowing:Project 319: Global Palaeogeography of the

Late Precambrian and Early Paleozoic.Project 321: Gondwana dispersion and

Asian accretion.Project 328: Palaeozoic microvertebrate

biochronology and marine/nonmarinecorrelation.

Project 335: Biotic Recovery from MassExtinction events - patterns, processesand implications.

Project 351: Early Paleozoic Evolution fromthe nucleus to the margins in Africa andSouth America.

Project 386: Response of the Ocean /Atmosphere System to Past GlobalChanges.

Project 410: The Great OrdovicianBiodiversification Event.

7. Accomplishments and productsgenerated in 1998

a. The GSSP for the base of theDarriwilian Stage at Huangnitang, China waspublished in Episodes, v. 20., no. 3.

b. A rather elaborate monument forthe GSSP for the base of the DarriwilianStage was dedicated at Huangnitang onSeptember 20, 1998 during a post-meetingfield excursion associated with a meeting ofIGCP 410 held in Nanjing.

c. Roger Cooper and GodfreyNowlan, Chair and Secretary, respectively,of the Cambrian-Ordovician BoundaryWorking Group reported the results of thepostal ballot to approve the choice of theGreen Point Section as the global stratotypesection and point (GSSP) for the base of the

Ordovician System. The vote was 9approving, 3 disapproving, and 1 noresponse. The boundary would be placed atthe first appearance of the conodontIapetognathus n. sp. 1. A paper describingthe new species of Iapetognathus is in finalrevision. Once the paper is in press, asubmission will be made to the OrdovicianSubcommission.

d. An informal business meeting ofthe Subcommission was held on the eveningof June 22, 1998 during the SixthInternational Conference of the GraptoliteWorking Group of the InternationalPalaeontological Association. The goals ofthe Subcommission were reviewed for 35participants of the graptolite conference,including 6 titular members, in attendance.Several papers dealing with Ordovicianbiostratigraphy and especially relevant tothe activites of the Subcommission werepresented. Associated field excursionsprovided opportunities for examiningOrdovician graptolite sucessions in centraland southwestern Spain.

e. Considerable progress was madeevaluating candidate stratotype sections forthe base of the N. gracilis graptolite zone (=base of Upper Ordovician Series). Withsupport from the National GeographicSociety and the Chinese Academy ofSciences, Stan Finney, Stig Bergst�m, ChenXu, and Wang Zhi-hao investigated thesection at Pingliang, Gansu Province, Chinain September 1998. In Nanjing, they alsostudied extensive graptolite collections fromthe candidate section at Dawangou, XinjiangProvince.

f. A meeting of IGCP 410 (the GreatOrdovician Biodiversification Event) inNanjing, 16-18 September, 1998, providedthe opportunity for more than 30Ordovician paleontologists to presentpapers, some of which addressed candidatestratotype sections.


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g. In 1998 a 57-page issue ofOrdovician News, No. 15, was published. Itwas edited by S. Henry Williams. h. A Friends of the Ordovicianmeeting was held on October 27, 1998 at theAnnual Meeting of the Geological Society ofAmerica in Toronto, Canada. More than 40Friends, including 5 titular members,attended. Stan Finney reported on 1998activities of the Subcommission.

i. Dr. Guillermo L. Albanesi has beenappointed as Acting Secretary of theSubcommission to serve in place of S. HenryWilliams.

8. Problems encountered in 1998

S. Henry Williams has resigned asSubcommission Secretary, and considerabletime passed before Guillermo Albanesi wasappointed Acting Secretary. A plannedreview of Corresponding membership wasdelayed as a result.

9. Work plan for 1999

a. Ordovician News, No. 16, will beassembled by Guillermo Albanesi andpublished in the Spring 1999.

b. A formal postal ballot will betaken on two candidate stratotype sections(the Ledge Section in Newfoundland and theDiabasbrottet Section in Sweden) for thebase of the T. approximatus graptolite Zone(the base of the second global subdivision ofthe Ordovician).

c. The 8th International Symposiunon the Ordovician System will be held inPrague, Czech Republic, 21-25 June, 1999.It will be coordinated with and followed bythe Barrande Conference on 26 June, and itwill include pre- and post-symposium fieldexcursions to Morroco, Germany andPoland, and the Barrandian area. The meeting

will provide many opportunities for opendiscussions on candidate stratotype sectionsand biohorizons and for meetings of titularmembers at which membership will beevaluated and a new secretary formallyappointed.

d. The Cambrian-Ordovicianboundary GSSP submission will bepublished in Ordovician News, No. 16 anddiscussed at length at the 8th ISOS. Aformal vote by the OrdovicianSubcommission will be taken immediatelyafter the Prague Symposiun on approval ofthe Green Point GSSP for the base of theOrdovician System. If approved, it will besubmitted to the ICS in late summer 1999.

e. Assuming that adequate progressis made by Prague and adequate discussiontakes place at the symposium, a formal voteby the Ordovician Subcommission will betaken immediately after the PragueSymposiun on approval of the WhiterockCanyon GSSP for the base of the MiddleOrdovician System.

f. Calera, Alabama (USA) andF�gels�ng, Sweden, will be revisited inJanuary and April, 1999, respectively, forfinal evaluation as candidate stratotypesections for the base of the Nemagraptusgracilis Zone (= base of Upper OrdovicianSeries).

g. The research committee of theGOES Program will identify and encourageresearch projects consistent with theprogram, and will plan dedicated sessions formeetings in 1999 of the Geological Societyof America and the 8th InternationalSymposium on the Ordovician System.

h. The Corresponding Membershipof the Subcommission will be reviewed.

10. Anticipated work plan for 1997-2000

a. The Executive will continue tofocus on defining boundary stratotypes for


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all Stage and Series subdivisions of theOrdovician System. Considerable progressis planned for 1998 and 1999. Goals forformal ballots by the Subcommission areearly 1999 for the base of the approximatusZone, late 1999 for the base of the laevisZone, and early 2000 for the base of thegracilis Zone.

b. The Subcommission will sponsor asymposium titled ÒPaleontological, strati-graphical, and paleogeographical relationsamong South America, Laurentia, Avalonia,and Baltica during the OrdovicianÓ at the31st International Geological Congress inBrazil, 6-17 August, 2000.

11. Potential funding sources outsideIUGS

The Subcommission has no regularfunding sources outside IUGS. Individualmembers of the executive, Voting Membersand Corresponding Members must find theirown financial support to carry out theirresearch activities on boundary stratotypesand to attend various meetings (GSA-Friends of Ordovician, 8th ISOS-Prague).

INTERNATIONAL SYMPOSIA ANDCONFERENCES

8TH INTERNATIONAL SYMPOSIUM ONTHE ORDOVICIAN SYSTEM TO BEHELD IN PRAGUE, CZECH REPUBLIC,JUNE 21-25, 1999

List of submitted papers

Quo vadis Ordovician?

ACHAB AìCHA, ASSELIN ESTHER, LIANGBO: ÇCHITINOSÈ- A client-servermicrofossil image- and data-acquisitionsyst�m

ALBANESI GUILLERMO L., ORTEGAGLADYS, BARNES CHRISTOPHER R.,H�NICKEN MARIO A.: Conodont-graptolite biostratigraphy of theGualcamayo Formation (Middle Ordo-vician) in the Gualcamayo-Guandacolrivers area, Argentina Precordillera

ASTINI RICARDO A.: The Late Ordovicianglaciation in the Proto-Andean margin ofGondwana revisited: geodynamicimplications

ASTINI RICARDO A.: Sedimentologicalconstrains on the Middle-UpperOrdovician Extension in the exotic toGondwana Precordillera Terrane

ASTINI RICARDO A.: Sedimentary record,vulcano-tectonic cyclicity andprogressive emergence of an EarlyOrdovician perigondwanan volcanic arc:the Famatina System

BARNES CHRISTOPHER R., ZHANGSHUNXIN: Pattern of conodontextinction and recovery across theOrdovician-Silurian boundary interval

BERGSTR�M STIG M., FINNEY STANLEYC., CHEN XU, WANG ZHI-HAO: TheDawangou Section, Tarim Basin(Xinjiang Province), China: Potential asglobal stratotype for the base of theNemagraptus gracilis Biozone and thebase of the global Upper OrdovicianSeries

BERRY WILLIAM B.N., FINNEY STANLEYC.: New Insights into Late Ordoviciangraptolite extinctions

BOGOLEPOVA OLGA K.: Ordoviciancephalopods and lingulate brachiopodsfrom the Southern Alps: remarks onpalaeogeography

BOTTING JOSEPH P.: The ecological effectsof volcanic ash-fall in the marineOrdovician of Central Wales

BOTTING JOSEPH P., THOMAS ALAN T.:A pseudoplanktonic inarticulatebrachiopod attached to graptolites andalgae


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BRENCHLEY PAT J., MARSHALL JIM D.:Relative timing of critical events duringthe late Ordovician mass extinction.

BRUSSA EDSEL D., MITCHELL CHARLESE., ASTINI RICARDO A.: Ashgillian(Hirnantian?) graptolites from thewestern boundary of the ArgentinePrecordillera

BUDIL PETR: Some comments on the genusOrmathops DELO from the BohemianOrdovician

CARRERA MARCELO G., SçNCHEZTERESA M., BENEDETTO JUAN L.:Paleo-environmental controls onbiofacies in the early Ordovicianlimestones of the Argentine Precordillera

CHEN XU, RONG JIA-YU, C. E.MITCHELL, D. A. T. HARPER, FANJUN-XUAN, ZHANG YUAN-DONG, ZHANREN-BIN, WANG ZHI-HAO, WANGZHONG-ZHE, WANG YI: Stratigraphy ofthe Hirnantian Substage fromWangjiawan, Yichang, W. Hubei andHonghuayuan, Tongzi, N. Guizhou,China

CHRISTIANSEN J¯RGEN L., STOUGESVEND: Using palaeo-oceanographicalmodelling in reconstructing EarlyOrdovician palaeogeography

COCKS L. R. M.: Ordovician geography ofSouth-east Asia

COOPER JOHN D.: Depositional andSequence Stratigraphic Framework ofUpper Ordovician Platform to BasinSections, Central Nevada, USA

COOPER ROGER A.: The Ordovician timescale - calibration of graptolite andconodont zones

COOPER ROGER A.: Graptolites and thegreat Ordovician biodiversification event

COOPER ROGER A., NOWLAN GODFREYS.: Proposed global stratotype sectionand point for base of the OrdovicianSyst�m

COPPER PAUL: Brachiopod extinction andrecovery at the Ordovician / Silurianboundary, Anticosti, E Canada

DORNING KEN J.: Ordovician acritarchbiohorizons, palaeoenvironmental inter-pretation and event stratigraphy

DRONOV ANDREI, HOLMER LARS E.:Depositional sequences in theOrdovician of Baltoscandia

DROSER MARY L., LI XING, JOHNSRONALD, SHEEHAN PETER: TheOrdovician Radiation: Evidence fromCarbonate Biofabrics of the Great Basin,western USA

EBBESTAD JAN OVE R., H�GSTR�MANETTE E.S.: Gastropods andmachaeridians of the Baltic lateOrdovician

EGENHOFF SVEN, MALETZ J�RG,ERDTMANN BERND-D.: UpperOrdovician basin evolution in southernBolivia

EGERQUIST EVA: Early Ordovician(Billingen-Volkhov stages) BrachiopodFaunas in the East Baltic

ELIAS ROBERT J., YOUNG GRAHAM A.,NOWLAN GODFREY S., DOBRZANSKIEDWARD P., RUDKIN DAVID M.:Ordovician-Silurian boundary sectiondiscovered near Churchill, Manitoba:preliminary report

ERDTMANN BERND-D., SUAREZ-SORUCORAMIRO: The Ordovician Tectono-stratigraphy of Bolivia

ESTEBAN SUSANA B.: Cyclopygidtrilobites and associated facies from theOrdovician of the Famatina Basin(Northwestern Argentina): Paleogeo-graphic and evolutionary implications

FEDOROV PETR V.: A new type of organicmud mound from the Lower Ordovicianof the East Baltic

FINNEY STANLEY C., BERGSTR�M STIGM., CHEN XU, WANG ZHI-HAO: ThePingliang section, Gansu Province,China: Potential as global stratotype for


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the base of the Nemagraptus gracilisBiozone and the base of the globalUpper Ordovician

FINNEY STANLEY C., BERRY WILLIAM B.N.: Late Ordovician graptolite extinction:the record from continental marginsections in central Nevada, USA

FORTEY RICHARD A.: Olenid trilobites aschemoautotrophic symbionts

FOSTER CLINTON B., WINCHESTER-SEETO THERESA M., O'LEARYTERESA: Preliminary study of theenvironmental significance of MiddleOrdovician (Darriwilian) acid resistantmicrofossils from the Canning Basin,Western Australia

FRYDA JI¯ê, ROHR D. M.: Taxonomy andPaleobiogeography of the OrdovicianClisospiridae and Onychochilidae(Mollusca)

GAINES ROBERT R., DROSER MARY L,HUGHES NIGEL C.: The IchnologicalRecord in Ordovician Mudstones:Examples from the Cincinnatian strata ofOhio and Kentucky (U.S.A.)

GUBANOV ALEXANDER P., BOGOLEPOVAOLGA K.: Minute fossils from theOrdovician Uggwa Limestone of theAustrian Carnic Alps

GUBANOV ALEXANDER P., EBBESTAD JANOVE R., BOGOLEPOVA OLGA K.:Microcommunity of the Boda Limestone(Upper Ordovician, Sweden)

HARPER DAVID A.T., RONG JIA-YU,SHEEHAN PETER: Ordovician diversitypatterns in early rhynchonelliform(protorthide, orthide and strophomenide)brachiopods

HARPER DAVID A.T., RONG JIA-YU, ZHANREN-BIN: Late Ordovician developmentof deep-water brachiopod faunas

HEUSE Thomas: New biostratigraphicaland biofacial aspects of the Ordovicianof Saxo-Thuringia, Germany

HINTS OLLE: Ordovician scolecodonts ofthe East Baltic and surrounding areas Ðan overview

HORNY RADVAN J.: Gastropod,paragastropod and tergomyan bio-stratigraphy of the Ordovician ofBohemia

HUFF WARREN D., M�FT�OGLU ELIF,KOLATA DENNIS R., BERGSTR�MSTIG M.: K bentonite bed preservationand its event stratigraphic significance

JIN JISUO: Evolution and extinction of theLate Ordovician epicontinentalbrachiopod fauna of North America

KALJO DIMITRI, HINTS LINDA, HINTSOLLE, MARTMA TONU, NOLVAKJAAK: Carbon isotope excursions andcoeval biotic-environmental changes inthe late Caradoc and Ashgill of Estonia

KENRICK PAUL, KVAéEK ZLATKO,BENGTSON STEFAN: PutativeOrdovician land plants from centralBohemia reinterpreted as animals

KOREN TATJANA N., SOBOLEVSKAYARIMMA F.: Facies and faunal diversityacross the Ordovician-Silurian boundaryin the Asian part of Russia and adjacentterritories

KRSTIC B., MASLAREVIC LJUBINKA,ERCEGOVAC M., ZAJIC SLAVICA:Ordovician of the East - Serbian SouthCarpathians

LEE DONG-CHAN: Paleogeography andbiostratigraphy of the Hystricuridae (theTrilobita); a preliminary study on theirevolutionary implications

LEHNERT OLIVER, MILLER JAMES F.,COCHRANE KAREN: Palaeobotryllusand friends: Cambro-Ordovician recordof probable ascidian tunicates

LESLIE STEPHEN A., LEHNERT OLIVER:New insight into the phylogeny andpaleogeography of Cahabagnathus(Conodonta)

LINNEMANN ULF: The geotectonic settingof the Ordovician of the Saxo-Thuringian


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Terrane (Central European Variscides,Germany)

LOCH JAMES D., STITT JAMES H.,MILLER JAMES F.: TrilobiteBiostratigraphy through the Cambrian-Ordovician boundary interval at LawsonCove, Ibex, western Utah, U.S.A.

LOI ALFREDO, DABARD MARIE-PIERRE:Stratigraphic significance of siliceous-aluminous nodules in Ordovicianformations of the Armorican Massif(France) and Sardinia (Italy)

MALETZ J�RG: Late Tremadoc graptolitesand the base of the Tetragraptusapproximatus Zone

MALETZ J�RG, EGENHOFF SVEN,ERDTMANN BERND-D.: Late Tremadocto early Arenig graptolite succession ofsouthern Bolivia

MçNGANO M. GABRIELA, BUATOIS LUISA.: Ichnofacies models in EarlyPaleozoic tide-dominated quartzites:onshore-offshore gradients and theclassic Seilacherian paradigm

MCCORMICK TIM, OWEN ALAN W:Ordovician biodiversity change in theBritish Isles: a database approach. II. Acase study on the trilobites of the Girvandistrict

MEIDLA TÍNU, AINSAAR LEHO, HINTSLINDA, HINTS OLLE, MARTMA TÍNU,NÍLVAK JAAK: The mid-Caradocianbiotic and isotopic event in theOrdovician of the East Baltic

METTE WOLFGANG, SERVAIS THOMAS:The messaoudensis-trifidum acritarchassemblage (late Tremadoc-early Arenig)from the Barriga Shales (Sierra Morena,SW-Spain)

MIKULç RADEK: Ordovician of theBarrandian area: development of ichno-assemblages

MILLER JAMES F., FLOKSTRA BRITTANYR.: Graphic Correlation of ImportantCambrian-Ordovician Boundary Sections

MILLER JAMES F., LOCH JAMES D.,STITT JAMES H., ETHINGTONRAYMOND L., POPOV LEONID E.,EVANS KEVIN R., HOLMER LARS:Origins of the Great OrdovicianBiodiversification: The Record atLawson Cove, Ibex Area, Utah, USA

MOLYNEUX STEWART G.: Acritarchbiostratigraphy of the Skiddaw Group(Tremadoc-Llanvirn), NW England

MONTENARI MICHAEL, SERVAISTHOMAS: Lower Palaeozoic (LateCambrian Ð Early Ordovician) acritarchsfrom the metasedimentary Baden-Baden-Zone (Schwarzwald, SW-Germany)

MYROW PAUL M., TAYLOR JOHN F.,MILLER JAMES F., ETHINGTON RAYL., RIPPERDAN ROBERT, BRACHLECHRISTINA, OWEN MELISSA:Stratigraphic synthesis of the Cambrian-Ordovician rocks of Colorado

NEUMAN ROBERT B.: Arenig-earlyLlanvirn age Celtic brachiopodassemblage reaffirmed

NÍLVAK JAAK: Ordovician chitinozoanbiozonation of Baltoscandia

ORTEGA GLADYS, ALBANESI GUILLERMOL.: Graptolite biostratigraphy of theGualcamayo Formation (MiddleOrdovician) at the Los Sapitos CreekSection, Argentina Precordillera

OWEN ALAN W., MCCORMICKTIMOTHY: Ordovician biodiversitychange in the British Isles: a databaseapproach. I. Rationale and databasestructure

P�LSSON CHRISTIAN, BERGSTR�M STIGM., HUFF WARREN D., LARSSONKENT, AHLBERG PER, KOLATADENNIS R.: Ordovician stratigraphy ofthe R�st�nga 1 drill-core, Scania,southern Sweden

PARIS FLORENTIN: Palaeobiodiversificationof Ordovician chitinozoans fromnorthern Gondwana


10

PARIS FLORENTIN, ROBARDET MICHEL,DABARD MARIE-PIERRE, GHIENNEJEAN FRAN�OIS, GUILLOCHEAUFRAN�OIS, LE H�RISS� ALAIN, LOIALFREDO, M�LOU MICHEL, FEISTRAIMUND, SERVAIS THOMAS,SHERGOLD JOHN, VIDAL MURIEL,VIZCAìNO DANIEL: Ordoviciansedimentary rocks of France

PARIS FLORENTIN, VERNIERS JACQUES,ACHAB AICHA, ALBANI ROBERTO,ANCILLETTA ANTONIO, ASSELINESTHER, CHEN XIAOHONG, FATKAOLDA, GRAHN YNGVE, MOLYNEUXSTEWART, NOLVAK JAAK,SAMUELSSON JOACHIM, SENNIKOVNIKOLAY V., SOUFIANE AZZEDDINE,WANG XIAOFENG, WINCHESTER-SEETO THERESA: Correlation ofOrdovician regional chitinozoanbiozonations

PERCIVAL IAN G., ENGELBRETSENMICHAEL J., BROCK GLENN A.:Distribution of Middle to LateOrdovician lingulate brachiopods in NewSouth Wales

PERCIVAL IAN G., WEBBY BARRY D.:Ordovician biodiversity profiles ineastern Australia

PODHALA�SKA TERESA: The UpperOrdovician and the Lower Silurian in thePeribaltic Depression: stratigraphy anddevelopment

POUSSART PASCALE F., WEAVERANDREW J., BARNES CHRISTOPHERR.: Late Ordovician Glaciation and HighAtmospheric CO2: Addressing anApparent Paradox via a Coupled ModelApproach

PUURA IVAR, VIIRA VIIVE: Chrono-stratigraphy of the Cambrian-Ordovicianboundary beds in Baltoscandia

RAUMER VON J�RGEN, STAMPFLIG�RARD: The peri-Gondwananorganization of pre-Variscan areas duringthe Ordovician

RUBINSTEIN CLAUDIA V., TORO BLANCAA.: Acritarch and graptolitebiostratigraphy in the lower Arenig ofthe peri-Gondwana related EasternCordillera, Argentina.

RUNKEL ANTHONY C., MILLER JAMESF., MCKAY ROBERT M., SHAW TOMH., BASSET DAMON J.: Cambrian-Ordovician Boundary Strata in theCentral Midcontinent of North America

SAMUELSSON JOAKIM: OrdovicianChitinozoa from R�gen, North-EastGermany

SAMUELSSON JOAKIM, VERNIERSJACQUES: Middle to Late OrdovicianChitinozoan Biozonation of theSennette, Dyle-Thyle and OrneauValleys, Brabant Massif, Belgium

SçNCHEZ TERESA M., CARRERAMARCELO G., WAISFELD BEATRIZ G.:Ordovician faunal turnover in theArgentine Precordillera

SARMIENTO GRACIELA N., G�L M. ALI,KOZLU H�SEYIN, G�NC�OGLU M.CEMAL: Darriwilian conodonts from theTaurus Mountains, southern Turkey

SCH�NIAN FRANK, EGENHOFF SVEN O.,MARCINEK JOACHIM, ERDTMANNBERND-D.: Glaciation at the Ordovician- Silurian boundary in southern Bolivia

SHAW FREDERICK C.: Kr�l�v Dv�rFormation, Prague Basin, and the end ofthe Ordovician trilobites

SOUFIANE AZZEDINE, ACHAB AìCHA:Chitinozoan biostratigraphy of theuppermost Vinini and the Hanson Creekformations, Late Ordovician, centralNevada

SOUFIANE AZZEDINE, ACHAB AìCHA,ASSELIN ESTHER: Late Ordovicianchitinozoans from Laurentia

SPRINKLE JAMES GUENSBURG, THOMASE., ROZHNOV SERGEI V.: CorrelationAnomaly Shown by Ordovician Shellyand Trace Fossils in Baltic Russia:Redating the Ordovician Radiation


11

STEEMANS P.: Cryptospores and sporesfrom the Ordovician to the Llandovery.A review

STEHL J�RN, ERDTMANN BERND-D.,EGENHOFF SVEN, MALETZ J�RG: Anew view on some Upper Ordovicianstrata in V�sterg�tland, Sweden

STURESSON ULF, HOLMER LARS E.,FELITSYN SERGEI, POPOV LEONID:Neodymium isotope composition ofEarly Paleozoic biogenic apatite fromBaltoscandia

SU WENBO: Sea-level changes, faunaresponses and their global correlation:Ordovician sequence stratigraphy at thesoutheastern margin of the upperYangtze platform, China

SU WENBO: The SMST and its superfacesubjacent to the Ordovician-Silurianboundary: sequence stratigraphyattribute of the glacial eustatic loweringdeposits and its significance

TAYLOR JOHN F.: Distribution andstratigraphic utility of Clelandia in theLower Ibexian of North America

TOLMACHEVA TATIANA YU., HOLMERLARS E., DRONOV ANDREI,EGERQUIST EVA, FEDOROV PETER,POPOV LEONID E.: Early Ordovician(Hunneberg-volkhov) facial and faunalchanges in the East Baltic

TORO BLANCA A.: Early Ordovician(Arenig) graptolites of NorthwesternArgentina (Cordillera Oriental andFamatina): Paleogeographic remarks

VAVRDOVç MILADA: Acritarch successionin Klabava and _�rka Formations(Arenig-Llanvirn): Evidence of ancientupwelling zone?

VERNIERS JACQUES, SAMUELSSONJOAKIM, VAN GROOTEL GEERT,GEEST DE PETER, HERBOSCH ALAIN:The Ordovician in Belgium: new litho-and biostratigraphical data withChitinozoa from the Brabant Massif andthe Condroz Inlier (Belgium).

WALLIN �SA: Middle Ordovician acritarchsfrom impact structures in Sweden

WANG XIAOFENG, CHEN XIAOHONG:Hirnatian "Stage" and Ordovician-Silurian Boundary

WEBBY BARRY D.: Ordovician reefsrevisited

WELLMAN CHARLES H.: Ordovician landplants: evidence and interpretation

WICANDER REED, PLAYFORD GEOFFREY:Biostratigraphic and paleogeographicimplications of an upper Ordovicianacritarch assemblage from the Bill'sCreek and Stonington formations,Michigan, U.S.A.

WILLIAMS S. HENRY, NOWLANGODFREY S., BARNES CHRISTOPHERR., BATTEN S. R.: The ledge section atCow Head, western Newfoundland as aGSSP candidate for the lower boundaryof the second stage of the OrdovicianSystem: new data and discussion of thegraptolite, conodont and chitinozoanassemblages

YOUNG GRAHAM A., ELIAS ROBERT J.:Coral distribution and associations in theUpper Ordovician Stony MountainFormation of Manitoba

ZIMMERMAN MATTHEW K., COOPERJOHN D.: Sequence Stratigraphy of theMiddle Ordovician Eureka Quartzite,Southeastern California and SouthernNevada

9TH INTERNATIONAL SYMPOSIUM ONTHE ORDOVICIAN SYSTEM, 2003

Call for proposals

Ordovician symposia were held inBrest, France (1971), Birmingham, UnitedKingdom (1974), Columbus, Ohio (1977),Oslo, Norway (1982), St. John's,Newfoundland (1988), Sydney, Australia


12

(1991) and Las Vegas, Nevada (1995). The8th ISOS will be held in Prague, CzechRepublic in June, 1999. Where will the 9th

ISOS be held? Who will host it? This is acall for proposals. Those who are interestedare encouraged to present a proposal atPrague. Give some thought to location,facilities, accommodations, accessibility,field trips, and publications. Also contactSubcommission Chair Stan Finney for adviceon developing proposal.

Bibliographic comment and invitation

The very recent book edited by BobPankhurst and Carlos Rapela by theGeological Society of London (SpecialPublication 142) is a nice state of the art tothe knowledge on the geology and evolutionof the Proto-Andean margin of Gondwana insouthern South America. A new book editedby Victor Ramos and Duncan Keppie (bythe Geological Society of America SpecialPaper 339) is also about to come out on"Gondwana Laurentia interactions". Bothbooks show, regarding the ArgentinePrecordillera and surrounding regions, thatthe topic on the origin and amalgamation ofthis continental margin is still verycontroversial and merits a lot more research.

Its fascinating Ordovician historynevertheless, will be at hand to allOrdovician workers if, at the next ISOS inPrague, Argentina is selected as the nextISOS host and come to share the knowledgeof our intriguing Ordovician basins with us.A formal proposal was already commentedin the Friends of the Ordovician Meetingheld at the 1997 GSA Annual Meeting atSalt Lake City and a new proposal will besubmitted for your consideration in Prague.We hope that all friends of the Ordovicianare willing to consider Argentina as the hostof the next meeting, a unique place to test

Laurentia-Gondwana interactions. We lookforward to suggestions.

RICARDO A. ASTINI

4TH BALTIC STRATIGRAPHICALCONFERENCE, RIGA, LATVIA, 1999

The upcoming conference of theBaltic Stratigraphical Association will beheld in Riga, Latvia 27-30 September 1999.After the conference two two-day field trips(Devonian and Quaternary) are planned.According to the first circular the main topicof the conference will be the problems andmethods of modern regional stratigraphy.

LINDA HINTZ

3RD INTERNATIONAL CONFERENCEON TRILOBITES AND THEIRRELATIVES, UNIVERSITY OFOXFORD, U. K., 2001

After successful meetings in Oslo,Norway (1973), and St Catherines, Canada(1997), this meeting will be based at theUniversity of Oxford, U. K., 2-6 April 2001.There will be four days based in Oxford,with field-trips preceding and following.The three full day formal programme willafford students of fossil arthropods anopportunity to present papers in boththeme-directed and open sessions. Therewill be invited presentations in the thematicsessions, and contributions of research atany stage of progress are invited for allsessions. Posters will be welcome. The twomain thematic sessions will be devoted tothe topics ÒFunctional morphology, modeof life and ecologyÓ and ÒBiodiversity andevolutionary patternsÓ. Papers on anyaspect relevant to the conference will beconsidered for the day of open sessions.


13

The pre- and post-conference field-trips will visit the classic Palaeozoic areas ofBritain including many Ordovician localities.Field guides will be provided to field-tripattendees. The pre-conference excursion (28March - 2 April, 2001) will start in Glasgowand examine sites in Scotland and northernEngland, finishing at Oxford in time for thestart of the formal sessions. The post-conference (7-11 April, 2001) excursion willcover Wales and the Welsh Borders, againending in Oxford.

For further details, contact:Dr. Derek SiveterGeological CollectionsUniversity Museum of Natural HistoryParks Road, Oxford OX1 3PWU. K.Tel .: + (01865) 272953Fax : + (01865) 272970E-mail: [email protected]

ALAN OWEN

7TH INTERNATIONAL GRAPTOLITECONFERENCE, ARGENTINA, 2001

The Ò7th International GraptoliteConferenceÓ will be held in Argentina,September 2001. The preparation of the firstcircular with further details is in progress,which will be eventually delivered includinga Òpreliminary registration formÓ.

The meeting is going to include twodays of formal talks, a mid-conference fieldtrip and a workshop. It is being planned toarrange one pre-conference field trip to theCordillera Oriental and Puna (North-westernArgentina), and one post-conference fieldtrip to the Precordillera (Western Argentina),in order to visit diverse classical localities forgraptolites and interesting new sections thatinvolve the Cambrian-Ordovician boundaryinterval, Lower, Middle and Upper

Ordovician sequences and the Ordovician-Silurian boundary interval.

GLADYS ORTEGA

PROJECTS

IGCP PROJECT N¡ 410: THE GREATORDOVICIAN BIODIVERSIFICATIONEVENT: IMPLICATIONS FOR GLOBALCORRRELATION AND RESOURCES

BARRY D. WEBBY

Aims

This globally based project wasestablished in 1997, and is expected tocontinue for five years to 2001. It has asoverall goal to fully appraise all knownrecords of preserved biotas in Ordovicianrocks, as a basis for comprehensivelyevaluating how the greatest diversification ofmarine life on earth took place.

Our approach to achieving thisprimary goal will require that weadditionally undertake the following tasks:1) Identify the significant global (andregional) bioevents;2) Establish the onshore-offshore biofaciesprofiles within each latitudinal belt;3) Assess, on a group-by-group basis,diversity trends for each major taxonomicgroup;4) Find possible physical and/or chemicalcauses (e.g., whether they be related tochanges in climate, sea level, volcanism, platemovements, etc.);5) Evaluate economically significant,Ordovician organic-matter assemblages ofcontrasting deeper pelagic and shallow,intracratonic oil-shale deposits.

An increased awareness of thefactors that may have controlled this majorperiod of biotic diversification of life on


14

earth, the development of a more highlyresolved Ordovician time scale, and the muchfuller analyses of facies and biotal gradients(especially in the oil shale deposits), areaspects of the work that should be of benefitto society.

Data collection

A web-based relational database hasbeen established for the input of relevantbiotal data (species level and above), as wellas related geographical, stratigraphical andenvironmental information, see: http://www.uc.edu/~amiller/comment4.htm

A wholly integrated stratigraphicframework has also been assembled toprovide the basis for establishing a morereliable framework for global and regionalcorrelation (Webby 1998).

Regional teams

A well-defined management structurehas been organized under general direction ofthe three Co-Leaders, Barry Webby(Australia), Mary Droser (USA) andFlorentin Paris (France). Seven regionalteams with invited co ordinators have beenproposed, for the main regions of the world:Australasia, Baltoscandia, China / Korea /Vietnam, Europe-Africa, Kazakhstan /Middle Asia / Siberia, North America andSouth America.

ALL persons who wish toparticipate in the compilation of Ordoviciandata from any of these regions shouldcontact Barry Webby, Mary Droser orFlorentin Paris as soon as possible to join asIGCP 410 members.

A set of guidelines for this regionalteam work will be sent by electronic mail toanyone who wants to participate in thework.

Clade teams

Additionally, we are currentlyestablishing independent clade teams toassess the worldwide distribution patternsof the main taxonomic groups, in time andspace. Leading specialists are beingapproached to act as team leaders. The workwill essentially complement the regionalstudy program.

Networking

Information about the activities ofIGCP project no. 410 are contained in thefollowing hard copy and electronic sources:1) Regular updates outlining progress, detailsof meetings and work program are includedin the Ordovician Subcommission'sNewsletter, Ordovician News (edited to1998 by S. Henry Williams, Dept of EarthSciences, Memorial University ofNewfoundland, St John's NF, A1B 3X5,Canada; e-mail:[email protected]. This news-letter is usually published between May andJuly each year. Requests for back issuesshould be sent to Henry Williams. GuillermoAlbanesi is the new Acting Secretary of theOrdovician Subcommission and is handlingthe compilation and publication of the 1999issue of Ordovician News. His e-mailaddress is: [email protected]) In June 1998, in order to widen interestand scope for our work program, wepublished the first issue of IGCP project no.410, Newsletter No. 1 - copies are availableon request from Barry Webby. NewsletterNo. 2 will be published in May 1999.3) We also provide to those participating inthe project regular updates of information byelectronic mail. Currently about 150members are sent these circulars.


15

4) The Web site at Macquarie University isas follows:http://www.es.mq.edu.au/MUCEP/igcp410.htm

Linkages

Project no. 410 is the first IGCPproject to highlight, exclusively, Ordovicianrocks and fossils - it aims to be fullycooperative with theSubcommission on Ordovician Stratigraphy,especially in aspects relating to theestablishment of a more refined time scale.

It also has limited overlaprelationships with two other IGCP projects:1) Aspects of work on Late Ordovicianbioevents and biodiversity shifts, with IGCPproject no. 421 (Co-Leaders Raymund Feistand John Talent). Their project mainlyfocusses on "North Gondwanan Mid-Palaeozoic Biodynamics".2) Studies of Arctic Canadian, Russian andBaltic Ordovician microvertebrates, withIGCP project no. 406 (Co-Leaders MarkV.H. Wilson and Tiiu M�rss). Their projectis entitled "Circum-Arctic PalaeozoicVertebrates".

Meetings

1997The principal meeting for 1997 was

held in the A.P. Karpinskii All-RussianGeological Research Institute (VSEGEI) inSt Petersburg, Russia, from 10-16 August, inassociation with an indoor and field meetingof the Working Group on OrdovicianGeology of Baltoscandia. It was attended by49 persons from 15 countries. Thisinaugural IGCP no. 410 meeting provided afirst opportunity to hold lengthydiscussions about how the early stages ofthe work program should be developed.

The meeting was attended byregional coordinators from theBaltoscandian, European, North American,Kazakhstani and Australian regional teams.Despite the severe financial crisis in Russia(no salaries paid to VSEGEI scientiststhrough the nine months prior to themeeting, and the Institute completely closedduring the month of May 1997), Dr TatjanaKoren and colleagues hosted a remarkablysuccessful meeting. A most useful 63-pagevolume of Abstracts was published and,with Swedish support, a most instructive24-page Excursion Guidebook. Included inthe Abstracts volume was a paper outliningthe main objectives and the work program ofIGCP no. 410 (Webby et al. 1997).

Three regional team meetings of theIGCP no. 410 project were also held during1997:1) North American meeting in associationwith the annual gathering of the "Friends ofthe Ordovician" at the Geological Society ofAmerica Annual Meeting, on 21 October inSalt Lake City, USA.;2) European-African meeting during theAPF/SGF (French PalaeontologicalAssocation/Geological Society of France)meeting on "Biostratigraphy andPalaeogeography", on 27 November in Lyon,France; and3) Australasian meeting, in conjunction withthe AAP (Australasian Association ofPalaeontologists) conference on the"Palaeobiogeography of Australasian florasand faunas", on 9 December, at theUniversity of Wollongong. It focussedmainly on how the Australasian Ordoviciandata should be collected, but the programalso included 13 published abstractsspecifically relevant to IGCP 410 (in Wright,1997).


16

1998Two meetings were scheduled as a

part of the work program for 1998. The firstwas held in early July - a meeting associatedwith an international symposium entitled"Paleodiversifications: land and seacompared", at the Universit� ClaudeBernard, Lyon 1, France. It included anumber of Ordovician workers from France,United Kingdom, Belgium, Spain, Poland,Russia, USA, Argentina and Australia. AnIGCP 410 workshop was held on theevening of 6 July. Ten abstracts published inthe symposium volume (Gayet & Otero,1998) specifically acknowledged IGCPproject no. 410.

The second comprised a successionof activities in September 1998 Ð an indoorand field meeting in South Korea from 7-12September (the indoor meeting held at theSeoul National University), and an indoormeeting and two field excursions in Chinafrom 13-23 September. The indoor meetingin China was held at the Nanjing Institute ofGeology and Palaeontology, AcademiaSinica, over three days (16-18 September).The field trips in China involved activities inthe Yangtze Gorges area near Yichang, and inan area near Changshan and Yushan countytowns (Jiangnan Belt of SE China).

In Korea a total of 22 scientistsrepresenting 7 countries participated in themeeting, and in China 42 scientists from 11different countries attended the IGCPactivities. The largest gathering of 35participants was held in the indoor meetingat the Nanjing Institute of Geology andPalaeontology. Important volumes ofabstracts and guidebooks were published inKorea (Choi and Lee 1998; Choi 1998), andin China (Rong et al., 1998; Wang 1998). Weparticularly acknowledge the support ofProfessor Duck K. Choi and colleagues inKorea, and of Professors Rong Jia-yu, ChenXu, Wang Xiao-feng, Zhou Zi-yi andcolleagues in China.

1999The major IGCP 410 meeting for

1999 is to be held in association with the 8thInternational Symposium on the OrdovicianSystem (ISOS) in Prague, Czech Republic,from 21-25 June, 1999. The symposium isbeing sponsored by IGCP 410, and willinclude special biodiversification andOrdovician palynology sessions. It will alsohave a series of workshop discussions tofocus on the establishment of workabledatabases, and the programs of work beingundertaken by the seven regional teams andthe clade groups. Two pre-symposiumexcursions (Germany & Poland, andMorocco) and one post-symposiumexcursion (classic Barrandean area of thePrague Basin) have been proposed, with aparticular focus on sedimentary deposits andthe cooler (Mediterranean-type) biotas.

At least two IGCP-relatedpublications are expected to result fromthese activities. First, extended abstracts willbe published in the Charles Universityjournal "Acta Universitatis CarolinaeGeologica", and these will include most ofthe IGCP 410 related contributions.Secondly, a special issue of the "Review ofPalaeobotany and Palynology" will be editedby Florentin Paris and Thomas Servais basedon the Ordovician palynomorph paperscontributed to the meeting.

For further details, contact theOrganisers of the 8th ISOS at:http://www.natur.cuni.cz/ISOS/or Eva Pacesova, Correspondence Secretary,8th ISOS, Czech Geological Survey,Geologicka 6, CZ - 15200, Praha 5,Barrandov, Czech Republic: fax +420 - 2 -58 -18 - 748

2000IGCP project no. 410 is scheduled to

hold two meetings in 2000. The first will bein Orange, central New South Wales(Australia) during July, and will be


17

associated with five interlocking events (twoIGCP meetings, three symposia andassociated excursions) that will immediatelyfollow the Australian Geological Congress inSydney (3-7 July) - meetings of IGCP 410and 421, the Australasian PalaeontologicalConvention, the 3rd InternationalSymposium on the Silurian System and the2nd Australasian Conodont Symposium (11-15 July). Field excursions will precede andpostdate the conference activities. Detailsare available on the Macquarie Universityweb site, as follows:http://www.es.mq.edu.au/MUCEP/auscos/auscos.htm

The second will involve sponsorshipof Session 2-7 of the Paleontology andHistorical Geology symposium at the 31stInternational Geological Congress in Rio deJaniero, Brazil, during August 2000. Thetheme for this special IGCP 410 session is:"The Great Ordovician BiodiversificationEvent - significance of biotal patterns in bothregional and global contexts". Co-convenorsare Barry Webby (Australia), Ramiro SuarezSoruco (Bolivia) and Gilberto Ace�olaza(Argentina). Abstracts are required by Sept.1, 1999. IGC web site is:http://www.31igc.org

2001A major meeting is to be held at the

University of California, Riverside, topresent results on completion of the surveyand analysis of global biodiversity patternswithin the individual clade groups. Athematic volume entitled "Ordovicianbiodynamics: global patterns of biodiversitychange" is expected to be publishedimmediately after that meeting.

Acknowledgment

The Co-Leaders of the IGCP ProjectNo. 410 (The Great Ordovician Bio-

diversification Event) wish to acknowledgein particular the continued UNESCO andIUGS financial support granted through theScientific Board of IGCP.

Relevant publications

CHOI, D. K. (ED.). 1998. Abstracts withProgram for IGCP Project No. 410 FieldMeeting to Korea: 1-38, Institute ofGeological and Environmental Sciences,Seoul National University, Korea.CHOI, D.K. AND D.-J. LEE. 1998.Guidebook for IGCP 410 Field Meeting toKorea: Ordovician stratigraphy andpalaeontology of the Taebaegsan region,Korea: 1-63, Institute of Geological andEnvironmental Sciences, Seoul NationalUniversity, Korea.GAYET, M. AND O. OTERO (EDS.). 1998.Pal�odiversifications, terres et merscompar�s, Symposium International, Abstr.vol.: 1-77, Lyon, France.RONG, J.-Y., ZHOU, Z.-Y. AND CHEN, X.(EDS.). 1998. Abstracts and Programme:International Symposium on the GreatOrdovician Biodiversification Event (IGCPProject No. 410). Spec. Issue, Palaeoworld10: 1-47, Laboratory of Palaeobiology andStratigraphy, Nanjing Institute of Geologyand Palaeontology, Academia Sinica.WANG, X.-F. 1998. Field Trip Guide, IGCPProject No. 410: The Ordovician in theYantgze Gorges area: 1-19, Yichang Instituteof Geology and Mineral Resources,(MGMR).WEBBY, B.D., 1998. Steps toward a globalstandard for Ordovician stratigraphy. Newsl.Strat. 36: 1-33.WEBBY, B. D., M. L. DROSER AND F.PARIS. 1997. Guidelines for Ordovicianglobal biodiversity work program - IGCPProject no. 410, 1997-2001. In Koren, T.N.(ed.), Meeting of Working Group onOrdovician Geology of Baltoscandia, Abstr.


18

vol.: 58-59, All-Russian Geological ResearchInstitute (VSEGEI) and Russian Academy ofSciences, St Petersburg, Russia.WRIGHT, A. J. (ED.) .1997: Palaeogeogeo-graphy of Australasian faunas and floras.Geol. Soc.Aust. Abstr. 48: 1-117, Univ.Wollongong, NSW.

Co-Leaders:

Barry D. WEBBY,Centre for Ecostratigraphy and Palaeo-biology, Macquarie University, 2109, NSW,Australia; [email protected]

Florentin PARIS,Laboratoire de Pal�ontologie, G�osciences-Rennes, Universit� de Rennes I,35042-cedex,France; [email protected]

Mary L. DROSER,Department of Earth Sciences, University ofCalifornia, Riverside, CA92521, USA; [email protected]

IGCP PROJECT N¡ 410: THE GREATORDOVICIAN BIODIVERSIFICATIONEVENT

Nanjing meeting (September 1998)

CHEN XU

An international working group hasbeen organized by myself including RongJia-yu, Zhang Yuan-dong, Fan Jun-xuan,Zhan Ren-bin, Wang Zhong-zhe, Wang Zhihao, Yin Lei-ming and Geng Liang-yu fromthe Chinese side and Chuck Mitchell andDavid Harper from abroad. The project ismainly working on the Hirnantian Substage.It is supported by the Chinese Academy ofSciences (Academia Sinica). During the past3 years, We have re-studied 4 classicsections, the Wangjiawan and Fengxiang

sections of Yichang (deeper water facies) andthe Honghuayuan, Tongzi and Ludiping,Saotao sections (nearshore shallow waterfacies) in the Yangtze region. Systematic andcontinuous collections of graptolites,brachiopods, trilobites, as well as conodont,acritarch, chitinozoan samples have beendone and the results of the identificationhave been completed. The Carbon-Oxygenanalysis has been also carried out. Recently,I worked with Chuck Mitchell in USA. We*are also fortunate that Mike Melchinvisited us and give us very good comments.The biozonation based on these field worksand the indoor works has been prepared. Indescending order they are:Parakidograptus acuminatus ZoneAkidograptus ascensus ZoneNormalograptus persculptus ZoneHirnantian bedsNormalograptus ojsuensi / N. extra-

ordinarious ZoneParaorthograptus pacificus ZoneDiceratograptus mirus SubzoneTangyagraptus typicus SubzoneUn-named SubzoneDicellograptus complexus ZoneFoliomena-Nankinolithus / Dicellograptus

complanatus ZoneThe base of the Hirnantian Substage

will be coincident with the base of the N.ojsuensis / N. extraordinarius Zone andincludes N. ojsuensis - N. extraordinarius,Hirnantia, and N. persculptus zones. Theworking group will submit reports to theOrdovician Symposium (Prague meeting)this year in June. This project also includesanother joint work with Stan Finney and StigBergstrom on the base of the UpperOrdovician. Stan and Stig visited China lastyear on the Pingliang and Longxian sectionsof the west margin of the North ChinaBlock. Stan and Stig will continuous to workwith me and my Chinese colleagues. Stan,Stig and I will submit reports at the comingPrague meeting. A related project lead by


19

Rong Jia-yu and also supported by theChinese Academy of Sciences (AcademiaSinica) on the O-S, F-F, and P-T massextinction and recovery is carried out at thesame time.

IGCP PROJECT N¡ 406

PEEP M�NNIK

IGCP Project 406 will have its 1999annual meeting in Riga, Latvia, inconjunction with the 4th Baltic StratigraphicConference (for more information aboutboth meetings contact Ervins Luksevics, e-mail: [email protected]), and in 2000 inSyktyvkar, Russia. Field-trip(s) to thePalaeozoic sections in the Subpolar Uralsare planned during the Syktyvkar meeting.Preliminary registration to the Syktyvkarmeeting is announced. For more informationabout this meeting contact AnnaAntoshkina:E-mail: [email protected] or PeepM�nnik, e-mail: [email protected]. Moreinformation about IGCP 406 is availablefrom Palaeozoic Microvertebrates Page -http://www.biology.ualberta.ca/wilson.hp/Paleozoic.html Palaeozoic News Page.

SCIENTIFIC REPORTS

LATE ORDOVICIAN CONODONTSFROM EUROPE

ANNALISA FERRETTI

Several Late Ordovician conodontfaunas from diverse localities in Europe werereported by a joint-team (G. Bagnoli, C.R.Barnes, A. Ferretti and E. Serpagli) in theprevious year. A Late Ordovician conodontassemblage was described for the first time

from Bohemia (Ferretti, 1998). On theoccasion of the Seventh InternationalConodont Symposium held in Europe(ECOS VII) recently taken in Italy, ourinterest focused also on the Late Ordoviciancalcareous levels exposed in Sardinia (Ferrettiand Serpagli, 1998; Ferretti et al., 1998 a, b,c; Leone et al., 1998) and in the Italian CarnicAlps, where a new section has been sampledand preliminary studied (Bagnoli et al.,1998).Finally, an important rich conodont fauna,implying important evolutionary andtaxonomic considerations was reported byBarnes et al. (1998) from south Wales.

a) BOHEMIA (A. Ferretti): Aconodont assemblage was reported for thefirst time from the Late Ordovician ofBohemia (Ferretti, 1998). Two differentlevels of the Kr�luv Dvur Formation(calcareous nodules below and "Pern�k Bed"above), both well known for theirbrachiopod and trilobite associations,produced poor and fragmentary conodontmaterial, which nevertheless supports anAshgill age. The Bohemian material includes13 multielement species representing 11genera, 8 of which are left in opennomenclature. The fragmentary preservationof the material and the incompleteness ofmany apparatuses make premature anydetailed interpretation on the faunaabundance. Nevertheless, when consideringthe fauna as a whole, elements ofScabbardella altipes (Henningsmoen, 1948)and Sagittodontina cf. robusta Kn�pfer,1967 are dominant; on the contrary speciessuch as Icriodella sp. are represented byvery few specimens.

The fauna from the Pern�k Bed ismore diverse than that from the calcareousnodules. It marks the appearance ofrelatively abundant elements ofSagittodontina cf. robusta and other specieslike Plectodina aff. tenuis (Branson andMehl, 1933), mostly represented by single


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elements. Furthermore, the M element ofAmorphognathus aff. lindstroemi is herereported.

The Bohemian conodont faunareported here still has strong Mediterraneanaffinity, bearing typical components of theMediterranean Province. Nevertheless,genera like ÒBirksfeldiaÓ (see point c) andPlectodina, common in Great Britain and inthe Carnic Alps faunas and present in thestudied collection with scarce elements,indicate the existence of a connection withthese regions.Closest faunal affinity appears to exist withthe fauna of Southern Europe, but there arealso similarities to the Anglo-Baltic area.

b) SARDINIA (A. Ferretti and E.Serpagli): Five sections were investigatedboth in SW and in SE Sardinia, four of whichhave documented the A. ordovicicus Zone(Ferretti and Serpagli, 1998; Ferretti et al.,1998 a, b, c). The conodont fauna includes,among others, representatives ofAmorphognathus ordovicicus Branson andMehl, 1933; Amorphognathus lindstroemi(Serpagli, 1967); Ansella cf. pseudorobusta(Serpagli, 1967); Dichodella cf. circumplicata(Orchard, 1980); Cornuodus bergstroemiSerpagli, 1967; Dapsilodus mutatus (Bransonand Mehl, 1933); Hamarodus europaeus(Serpagli, 1967); Icriodella cf. superbaRhodes, 1953; Istorinus erectus Kn�pfer,1967; Panderodus gracilis (Branson andMehl, 1933); Plectodina cf. alpina (Serpagli,1967); Sagittodontina robusta Kn�pfer,1967; Scabbardella altipes (Henningsmoen,1948); Hamarodus sp., Walliserodus sp.,ÓcarniodiformÓ element sensu Ferretti andBarnes, 1997. Conodonts recovered fromthese sections belong to the HDS(Hamarodus europaeus - Dapsilodusmutatus - Scabbardella altipes) biofacies ofSweet and Bergstr�m (1984).

The conodont fauna is closelysimilar in composition to that reported fromother areas of the cold-water Mediterranean

Province in the Late Ordovician.Nevertheless, the Sardinian fauna differsstrikingly from the others in the relativeproportion of the species, being dominatedby elements of Hamarodus europaeus,Amorphognathus sp. and Scabbardellaaltipes. Sagittodontina robusta and Istorinuserectus, dominant in other areas supposed tobe parts of the Northern Gondwana margin,are almost undetectable in Sardinia, theformer being represented mostly by veryrare ramiform elements and the latter by asingle certain element. Furthermore, typicallow-latitude species, like Plectodina cf.alpina and Dichodella cf. circumplicata, arehere reported.

In spite of the structural differences,the conodont faunas of SW and SE Sardiniaare similar in composition and in age. Theyonly differ in sample productivity, theformer being much higher, and in a slightlydifferent order of abundance of the mainspecies.

A microbiofacies study on thecalcareous horizon exposed in theCannamenda outcrop of SW Sardinia(Ferretti et al., 1998b) offered a goodexample of facies control in conodontdistribution with both samples packed byconodonts and completely barren ones. Fivemain microfacies have been recognized, twoof which are the conodont productivehorizons. The first one consists of a slightlydolomitized limestone which provided mostof the conodont fauna. When texture is stillvisible, it is a wackestone to packstonebearing echinoderm fragments, trilobites andrare bryozoans. Accumulation of ostracodeshells are locally present. Quartz isabundant. A second one is a wackestone-packstone which consists of dominantfragmentary echinoderms associated withbryozoans, trilobites, sponges and spongespiculae, brachiopods, gastropods and veryrare small cephalopods scattered in a micriticmatrix (?bioturbation). Quartz fragments are


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again common. A bryozoan-packstone and acoarse-grained encrinitic-packstone, as wellas a mixed bryozoan-encrinitic packstone,revealed to be completely barren inconodonts.

A poorly preserved but peculiarconodont assemblage was reported in onesection (Cea Brabetza) of SE Sardinia. Thefauna contains few elements ofDrepanoistodus cf. suberectus (Branson andMehl, 1933), Icriodina sp. s.f. and Oistodusvenustus s.f. Stauffer, 1935. Dapsilodusmutatus is abundant while Hamaroduseuropaeus is apparently absent andScabbardella only possibly present. Nobiofacies assignment in the scheme of Sweetand Bergstr�m (1984) is proposed, butstrong similarities appear to exist with theAshgillian conodont fauna described in theFrench Calcaire de Rosan by Paris et al.(1982).

c) CARNIC ALPS (G. Bagnoli, A.Ferretti and E. Serpagli): The newlyinvestigated Valbertad section is currentlyunder study. A well preserved, butextremely fragile, conodont fauna composedof very small individuals preliminarydocumented eighteen species belonging toseventeen genera (Bagnoli et al., 1998). Theconstituent species are: Amorphognathusordovicicus Branson and Mehl, 1933;Amorphognathus lindstroemi (Serpagli,1967); Acodus trigonius s.f. (Schopf, 1966);Ansella pseudorobusta (Serpagli, 1967);Cornuodus bergstroemi Serpagli, 1967;Dapsilodus mutatus (Branson and Mehl,1933); Decoriconus minutus (Serpagli,1967); Dichodella exilis Serpagli, 1967;Drepanoistodus suberectus (Branson andMehl, 1933); Hamarodus europaeus(Serpagli, 1967); Nordiodus italicus Serpagli,1967; Panderodus gracilis (Branson andMehl, 1933); Plectodina alpina (Serpagli,1967); Protopanderodus liripipus Kennedy,Barnes and Uyeno, 1979; Scabbardellaaltipes (Henningsmoen, 1948); Walliserodus

amplissimus (Serpagli, 1967); Icriodella sp.;Pseudooneotodus sp.; ÓcarniodiformÓelement sensu Ferretti and Barnes, 1997.

The material investigated offeredpossibilities of taxonomic revision on somespecies. Dichodella exilis s.f. Serpagli, 1967was regarded as the Pa element of theapparatus reconstructed by Orchard (1980)as Birksfeldia. In addition, also themorphospecies Prioniodus ethingtoniSerpagli, 1967 was included as the Pbelement. According to priority rules, thisapparatus was assigned to the GenusDichodella Serpagli, 1967 and Birsksfeldiaconsidered a junior synonym.

The composition of the conodontfauna of the Valbertad section closelymatches that reported by Serpagli (1967)from M. Zermula and Rifugio Nordio.Conodonts recovered from the Valbertadsection belong to the HDS (Hamaroduseuropaeus-Dapsilodus mutatus-Scabbardellaaltipes) biofacies of Sweet and Bergstr�m(1984). The possible gradation to theAmorphognathus - Plectodina biofaciessuggested by Sweet and Bergstr�m (1984) isalso indicated by the relative abundance ofthese two genera in this association.

The Valbertad material confirms thespecial character of the Carnic Alpsconodont assemblage inside SouthernEurope, being a moderate diverse fauna withtypical taxa like Nordiodus italicus, Acodustrigonius s.f. and Plectodina alpina.Distinctive representatives of the high-latitude Mediterranean Province such asSagittodontina robusta and Istorinus erectusare here apparently missing.

d) WALES (C.R. Barnes, A. Ferrettiand E. Serpagli): A high-diversity andabundant conodont fauna, obtained from theSholeshook Limestone that is exposedcompletely in a relatively recent andextensive roadcut at Whitland, south Wales,was preliminary reported by Barnes et al.(1998). The fauna includes over 16 000


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specimens and yields more than 25 conodontspecies, with those representingAmorphognathus, Plectodina /Aphelognathus and Eocarniodus comprisingabout two-thirds of the whole fauna.Decoriconus and Sagittodontina are reportedfrom the Anglo-Welsh area for the first time,the latter being characteristic of the high-latitude Mediterranean Province. TheWhitland conodont assemblage provides agood example of the moderately high-diversity fauna of the British Province,North Atlantic Realm for the Ashgill(Bergstr�m, 1990). This high abundance isunusual for Upper Ordovician conodontfaunas from the British Isles and thepreservation is moderately good allowingsome significant taxonomic revisions toseveral taxa, such as Dichodellacircumplicata and Eocarniodus gracilis.

Of particular biostratigraphic andphylogenetic importance is the occurrence ofabundant representatives ofAmorphognathus, and in particular therecovery of over 500 diagnostic"holodontiform" elements. Amorpho-gnathus ordovicicus occurs here from thebase of the section. In the lower third of thesection, A. superbus is also present in lownumbers. Therefore, it appears certain thatthe base of the Sholeshook Limestone at theWhitland section lies at or fractionally abovethe base of the A. ordovicicus Zone. A.ventilatus is present in moderate numbers. A.lindstroemi is more common in the middle-upper part of the section and shows agradual modification of the lateral denticlewhich becomes more and more defined andtends to migrate posteriorly. A new type ofholodontiform element bearing a main longdenticle only on the inner side of the cusp,so that the oral edge appears as having a kindof bifurcation, is present in the middle partof the section. A peculiar holodontiformelement with reclined cusp, similar in someways to the M element of A. tvaerensis,

represents the M element ofRhodesognathus elegans.

From the nature of the species ofAmorphognathus present in the fauna, theage of the Sholeshook Limestone at Whitlandis considered to be basal Ashgill.

A further conodont fauna wasrecovered from thin and slightly calcareousbeds in the overlying mudstone unit. Thecollection is dominated by Phragmodusundatus with small numbers of Plectodinasp. and Belodina confluens and indicatesfaunal affinities to the Midcontinent Realm.

Conodont collections were also madeof the Upper Ordovician Robeston Wathen,Sholeshook (Haverfordwest) and Trewernlimestones. On the basis of the recovery ofAmorphognathus ordovicicus, it isconcluded that these are of similar age to theSholeshook Limestone at Whitland. Theabsence of A. superbus suggests that theyare certainly no older and could be slightlyyounger.

References to specific reports

BAGNOLI G., A. FERRETTI, E. SERPAGLIAND G. B. VAI. 1998. Late Ordovicianconodonts from the Valbertad Section(Carnic Alps). In: M. C. Perri and C.Spalletta (Eds), Southern Alps Field TripGuidebook, ECOS VII, Giornale di Geologia,60, Spec. Issue: 138-149, 7 text-figs, 2 pls,Bologna.BARNES, C. R., A. FERRETTI, AND E.SERPAGLI. 1998. Upper Ordovicianconodont faunas from south Wales. In: G.Bagnoli (ed.), ECOS VII Abstracts, Bologna-Modena, 1998, 1-2, 9-10 (abs).FERRETTI A. 1998. Upper Ordovicianconodonts from the Prague Basin (Bohemia).In H. Szaniawski (ed.), Proceedings of theSixth European Conodont Symposium(ECOS VI), Palaeontologia Polonica: 121-137, 2 figs, 1 tab., 2 pls.


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FERRETTI A. AND E. SERPAGLI. 1998.Stratigraphic and biogeographic significanceof Late Ordovician from Sardinia (Italy). In:G. Bagnoli (ed.), ECOS VII Abstracts,Bologna-Modena, 1998, 1-2, 35-36 (abs).FERRETTI A., E. SERPAGLI, S. BARCA, ANDF. LEONE. 1998a. Late Ordovician conodontsfrom Umbrarutta between Donigala and LagoMulargia. In: E. Serpagli (ed.), SardiniaGuide-book, ECOS VII; Giorn. Geologia, 60,Spec. Issue: 202-208, 3 figs, 2 pls, Bologna.FERRETTI A., E. SERPAGLI, W. HAMMANNAND F. LEONE. 1998b. Conodonts andbiofacies from the Late Ordovician ofCannamenda (Bacu Abis). In: E. Serpagli(ed.), Sardinia Guide-book, ECOS VII;Giorn. Geologia, 60, Spec. Issue: 178-187, 2figs, 3 pls, Bologna.FERRETTI A., E. SERPAGLI, F. LEONE ANDA. LOI. 1998. The late Ordovician sectionCea Brabetza near San Basilio. In: E. Serpagli(ed.), Sardinia Guide-book, ECOS VII;Giorn. Geologia, 60, Spec. Issue: 96-101, 3figs, 1 pl., Bologna.LEONE F., A. FERRETTI, W. HAMMANN, A.LOI, G. L. PILLOLA AND E. SERPAGLI. 1998.Outline of the post-Sardic Ordoviciansequence in South-western Sardinia. In: E.Serpagli (ed.), Sardinia Guide-book, ECOSVII; Giorn. Geologia, 60, Spec. Issue: 39-56,2 text-figs, Bologna.

BLACK SHALES FACIES OF THEORDOVICIAN OF THE CUYOPRECORDILLERA

SILVIO H. PERALTA

The scope of this project is thebiochronologic, paleoenvironmental andrelated mineralization analysis of the blackshales deposits of the Cuyo Precordillera(Argentina): in a first step, this study isfocused on the graptolite faunas,sedimentologic features and sulphide

mineralization of the Los Azules Formation,early Caradoc in age (N. gracilis Zone) in theLa Chilca Hill area, Central Precordillera, andof the Gualcamayo Formation, early tomiddle Llanvirn in age, in Western slope ofthe Villicum range, Eastern Precordillera.This Project was supported by San JuanUniversity and was developed from January1997 to December 1998; during this time onepaper related to graptolite faunas of the LosAzules Formation has been published, andother dealing with stratigraphic topics,paleoenvironment and sulphide miner-alization related to the Los Azules andGualcamayo Formations is in review (XIIIArgentine Geological Congress, in revision).A paper on palynologic associations of theLos Azules Formation and other ongraptolite faunas of the Gualcamayo faunasare in course.

THE ORDOVICIAN FROM CERROBOLA REGION, SAN RAFAEL BLOCK,MENDOZA

CARLOS CINGOLANI AND ALFREDO J.CUERDA

Recent research carried out in theCerro Bola region, allowed the recognition ofthe Pavon Formation (Holmberg, 1948,nom.subst.), characterized by massivesandstones, siltstones and shales. A richgraptolite faune composed of 23 taxa(families Glossograptidae, Nemagraptidae,Dicranograptidae, Diplograptidae, Ortho-graptidae, Lasiograptidae and Retiolitidae)has been found in the cerro Bola-ArroyoPavon facies. From base to top thegraptolites are arranged into threeassemblages:1) Lasiograptus costatus, Normalograptuscf. tubuliferus, Amplexograptus aff. arctus,Orthoretiolites sp., Climacograptus bicornisand Climacograptus tridentatus.


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2) Dicranograptus ramosus ramosus,Dicranograptus nicholsoni nicholsoni,Dicranograptus ramosus cf. longicaulis.3_ Orthograptus truncatus aff. truncatus,Orthograptus apiculatus, Cryptograptusinsectiformis, Leptograptus validus validus,Dicellograptus salopiensis.

The species C. bicornis and C.tridentatus are present only in the lower andupper graptolite assemblages. Thegraptolites were described and theirbiostratigraphic ranges discussed. The age ofthe sequence is Lower Caradoc (C. bicornisBiozone). Now we focused to elucidate thestratigraphy, sedimentology and structuralaspects of the 700 m thick sequence, in closerelationship with the regional tectonicframework.

References

CUERDA, A. AND C. CINGOLANI. 1998. ElOrdov�cico de la regi�n del Cerro Bola en elBloque de San Rafael, Mendoza: sus faunasgraptol�ticas. Ameghiniana 35 (4): 427-448.Buenos Aires.CINGOLANI, C., CUERDA, A. ANDMANASSERO, M. (in press). Litoestrati-grafia de los dep�sitos silicocl�sticosordov�cicos del Cerro Bola, Bloque de SanRafael, Mendoza. Congreso Geol�gicoArgentino, Salta.

MISCELLANEA

Student Paleontological Society ÐSt. Petersburg State University, Russia

In 1998 the Student PaleontologicalSociety (SPS) was founded at theDepartment of Paleontology of the St.Petersburg State University. The main taskof SPS is to popularize paleontology amongstudents graduating in geology and biology,

as well as to co-ordinate scientific activitiesof the undergraduate and postgraduatestudents studying paleontology. Most SPSmembers have experience in the samplingand study of the Ordovician faunas from thesections in north-west Russia. Some of themare also studying Paleobotany, Devonian andCarboniferous paleontology north-westRussia and Cretaceous vertebrates fromKazakhstan. The activities of SPS includemonthly meetings dedicated to thediscussion of various current problems ofpaleontology, review of currentpaleontological and geological publications.Leading scientists who work inpaleontology, stratigraphy and biology givelectures to SPS members. In the future, theexpansions of SPS activities presupposesfield geological excursions to the Lower andMiddle Paleozoic sections in the vicinity ofSt. Petersburg and some other parts ofnorthwestern Russia, both for SPS membersand for any interested persons. Should youor your colleagues plan the trip to St.Petersburg we would be glad to see you asour guests at SPS meetings. We wouldappreciate it greatly if you would give us atalk about your studies. We would be alsograteful for any information concerninggrants and internships for students andyoung scientists studying paleontology.For contacts: Fax: + 7 (812) 346-11-29 (forMichael Zuykov, Chairman SPS).E-mail: [email protected]

MICHAEL ZUYKOV

Comment

Previous issues of Ordovician Newsseem to be a little light on when it comes tosubjects like Ordovician tectonics and basinanalysis, or even timescales. Mostcontributors seem to work on thepalaeontological side. I would be very keen


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to hear of people working on tectonics, orradiometric dating in the Ordovician.

FONS VANDENBERG

Notice

From the beginning of 1999 I havebecome the editor of Lethaia. Authors thatwish to publish in Lethaia can contact mefor further information or submitmanuscripts to the address on my name (seebelow).

SVEND STOUGE

Errata

There are two errors in the 15thIssue of Ordovician News. The informationÒOrdovician of the Siberian PlatformÓ waswritten by A. G. Yadrenkina only. The nextinformation, ÒProblems related to...Ó waswritten by G. P. Abaimova and A. G.Yadrenkina together.

GALINA ABAIMOVA

HONORARY NOTES

In 1998 memorable dates of twooutstanding Ordovician researchers werecelebrated in Estonia -- Valdar Jaanusson 75and Armin Opik 100. Some details can befound in Proceedings of the EstonianAcademy of Sciences. Geology, vol. 47,p.130-131/139-140.

DIMITRI KALJO

___________

In the Institute of Geology at SanJuan University, Argentina, with deep regretwe remember the death of Bruno A. J.Baldis on May 28th, 1997. As a researcherfrom CONICET and Professor of theBuenos Aires and San Juan Universities, hewas one of the leaders on trilobiteresearches, as well as a major contributor onthe knowledge of Early Paleozoic studies,through his long-standing and distinguishedwork related to stratigraphic and tectonictopics of Argentina, South America andmainly Gondwanaland. The results of suchresearches were published in over a hundredpapers, many of such belong to pioneerstudies in a number of different aspects ofStratigraphy, Paleontology and StructuralGeology. Not only was Bruno a dedicatedprofessional and an acknowledged authorityon Geology, but also a big friend, a personwith wide interests in culture, art, music; forthis reason he enjoyed very much travelingto different countries of the world in order toknow other peoples and their customs. Hiscareer was characterized by distinguishedservices to the discipline and he provide vitalleadership to those entering the field. Hislong, outstanding career in Geology wasacknowledged receiving the Award of theNational Academy of Sciences, Argentina, in1993. His happy, enthusiastic presence willbe missed by all of us who knew him andhad the pleasure and honor to work withhim.

SILVIO H. PERALTA


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CURRENT RESEARCH

ABAIMOBA, GALINA P. (Russia) iscontinuing her works on Ordovicianconodonts of the northern part of theSiberian Platform.

ACE�OLAZA, F. GILBERTO (Argentina) iscurrently working on several aspects ofregional geology and tectonic evolution ofNW-Argentina involving Ordovicianquestions. Recently, with J. C. Guti�rrezMarco, we have done a revision of theMoridunian graptolite fauna of the FamatinaRange (Western Argentina), includinghorizontal tetragraptids (Tetragraptusakzharensis) as well as some reflexed-extensiform and declined didymo-graptids(Didymograptus (Expansograptus) cf.constrictus).

ACE�OLAZA, GUILLERMO F. (Argentina) iscurrently working on faunal dynamics of theW and NW Gondwanan margin during theOrdovician. I have moved to Madrid, Spain,working under a grant from the ArgentineResearch Council (CONICET) with JuanCarlos Guti�rrez-Marco. I have beeninvolved on finishing papers related tograptolites (Ordovician), trace fossils andechinoderms (Cambrian-Ordovician) fromNW Argentina and Spain.

AINSAAR, LEHO (Estonia) is continuing hiswork on carbonate sedimentology and stableisotope geology of Caradocian (with T�nuMeidla and T�nu Martma) and with detailedstratigraphy and sea-level history ofArenigian in Baltoscandia (with T�nuMeidla, Andrei Dronov and Oive Tinn).

ALBANESI, GUILLERMO L. (Argentina) iscurrently working on conodont taxonomy,biostratigraphy and biofacies from theCambrian-Ordovician boundary interval inthe Volcancito Formation, Famatina Range,

Argentina. These studies are being carriedout at the Centre for Earth and OceanResearch, University of Victoria, Canada, asa post doctoral fellowship (CONICET,Argentina), under the supervision of C. R.Barnes and M. A. H�nicken. Studies onthese new sections are being undertakentogether with colleagues from Argentina (S.Esteban, G. Ortega, F. Tortello, E. Ottone)in order to analyze the associated macro andmicrofauna, and paleobiological eventsthroughout the Cambrian-Ordovicianboundary. Moreover, other parallel studiesare being continued on Ordovician conodont-graptolite biostratigraphy from ArgentinaPrecordillera (including a new project grantedby CONICET regarding the Ordovician-Silurian boundary interval, with G. Ortegaand M. A. H�nicken) and Ordovicianconodonts in extended projects regarding thestratigraphy and paleontology of diverseformations from Northwestern Argentina(with colleagues from the Universities ofSalta, Tucuman, C�rdoba, La Plata andBuenos Aires, the Geological Survey ofArgentina, Spain and France).

ALDRIDGE, DICK (United Kingdom) mymain Ordovician interests lie in the SoomShale, which I continue to work on withSarah Gabbott and Hannes Theron. Sarah'spaper on the taphonomy of the Soom biotawas published this year, and she has one inpress in 'Palaeontology' on the orthocones.We also published a short paper on thechitinozoans and have a paper in press in'Lethaia' (with Simon Braddy) on aeurypterid with three-dimensionallypreserved gills. In addition, I retain aninterest in Ordovician conodonts, especiallyprioniodontids (with Stephanie Barrett andViive Viira).

ARMSTRONG, HOWARD A. (UnitedKingdom) is currently working on conodontsfrom mid- Ordovician limestone clasts in


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LORS of the Midland Valley, Scotland (withAlan Owen); Arenig cherts and conodontsfrom the Southern Uplands (with LuTingqing and Jim Floyd); growth in deepwater conodonts; new tectono-stratigraphicmodels for the British Caledonides (withAlan Owen). Just about to start a project onREE geochemistry of ?Ordovician chertsfrom the Highland Border Complex.

ASTINI, RICARDO A. (Argentina) continuesworking on comparative sedimentology,stratigraphy and basin analysis of the threemajor Argentine Ordovician sedimentarybasins located along the Andes, theArgentine Precordillera, the FamatinaSystem and the Northwestern basins,particularly Sierras Subandinas andCordillera Oriental. The aim is to comparestyles and patterns of sedimentationinvolving regions that have completedifferent histories of evolution. Regardingthe Precordillera, I am focussed to the earlystages of rifting from Laurentia but alsoactively working on the postcollisionalsedimentary patterns. Particular emphasis Iam making in sedimentation related to theextensional setting in the eastern tectofaciesand an update of the stratigraphy of thewestern tectofacies. Comparisons withtypical Gondwana units like those of thenorthwestern basins may bring new light onthe different controls that were active at thetime in such different environments. TheFamatina System has shown to bespectacular in terms of its combinedsedimentary and volcanic history. Deepeningon several topics is the aim of a project justfunded by the Research Council of C�rdoba(CONICOR). I am also working incollaborative projects on K-bentonites andthe Hirnantian glaciation along the proto-andean margin of southern South Americawith colleages in the United States and UK.

BAGNOLI, GABRIELLA (Italy) is working onlower Ordovician conodont biostratigraphyand biofacies from �land (Sweden), onupper Ordovician conodonts from the CarnicAlps (Italy), and on Ordovician chitinozoanassociations from Newfoundland.

BARNES, CHRIS (Canada) continues toexpand field-based Lower Paleozoicconodont and stratigraphic studies in theCanadian Cordillera. Detailed platform tobasin transects have been sampled in thesouthern, central and northern RockyMountains in high alpine terrain withexceptional exposure (with Lee McKenzieMcAnally and Leanne Pyle as Ph.D.students). The most recent transect, in thecentral Rockies, was initiated in 1998 withanother field season in 1999. Jianqin Chencontinues Ph.D. work in Ordovicianconodonts from North and South China.Guillermo Albanesi arrived in January 1999for a PDF primarily continuing work onOrdovician conodonts from Argentina with afocus on those near the C/O boundary.Shunxin Zhang recently completed a PDFproject on Early Llandovery conodonts fromAnticosti Island, Quebec as part of acontinuing study of the O/S conodontextinction and the subsequent adaptiveradiation. In a related project, David Jowett(M.Sc. student) completed field work in aproject to study the latest Ordovician tolower Ludlow conodont faunas of the CapePhillips Formation (slope facies), ArcticIslands. Work completed, nearingcompletion or in progress includes: Ashgillconodonts of the Whitland section, SouthWales with Annalisa Ferretti; upperOrdovician conodonts from the Bowan Parksuccession, N.S.W., Australia, Geobios(1999), with Yong-yi Zheng and BarryWebby); Nd isotope work (with CindyWright and Stein Jacobsen, one paper inpress, one in preparation); modelling theAshgill glaciation (Paleoceanography, in


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press, with Pascale Poussart and AndrewWeaver); Ordovician conodonts of TarimBasin, China (2 papers in preparation withZhixin Zhao); strontium isotope curve forthe Ordovician and Silurian (GeochimicaCosmochimica Acta, 1998, Qing et al.);evolutionary study of Paroistodus originalis- P. horridus transition (with G. Albanesi,submitted); Arenig conodonts from the CowHead Group, Newfoundland (with DavidJohnston, 2 part issue in press in Geologicaet Paleontologica). As part of the work withthe Subcommission, contributions have beenmade with regard to the base of theOrdovician and to the base of the secondStage.

BARRETT, STEPHANIE (United Kingdom) iscurrently working on prioniodontidconodont apparatuses from the Ordovician.With well preserved collections from Estoniaand Russia, I am concentrating on theapparatuses, the histology of the elementsand evidence of functional morphology. Ifany clusters of prioniodontid elementshave been recently discovered, or if anyassemblages have come to light, I would beexceptionally interested, as this wouldobviously be pivotal information for myresearch.

BEHNKEN, FRED H. (U.S.A.) is working as aconsultant in Midland, Texas. In addition todescribing samples and doing petrographicwork, I am working outcrop samples fromthe Mineral Wells, Texas area from theEllenburger and have worked the conodontsfrom over 25 wells in the Llano, West Texasand Oklahoma area (Arbuckle, Ellenburger).

BENEDETTO, J. LUIS (Argentina). I amstudying new early Ordovician silicifiedbrachiopod faunas from the San JuanLimestone, in the Argentine Precordillera.The taxonomic study of the late Ordovicianbrachiopods from the La Cantera Formation

is actually in progress. I have recentlycompleted a work on the very interestingLate Caradoc-Ashgill brachiopod fauna fromthe Trapiche Formation and other on thegenus Drabovinella from the NW Argentina.Both papers were submitted to Ameghinianafor publication. Other studies include adescription of the rich brachiopod faunafrom the Arenig volcaniclastic succession ofthe Famatina Range and early Ordovicianbrachiopods from the Puna region. Otherresearch focuses on the factors controllingthe (paleo)geographical distribution of hightaxa of Ordovician brachiopods. I am alsoworking together Teresa S�nchez andcollaborators in the IGCP project 410 (TheGreat Ordovician biodiversification Event)

BERESI, MATILDE SYLVIA (Argentina) isactively working on the biostratigraphy,microfacies and depositional paleo-environments of Ordovician carbonateplatform sequences from the San Juan andMendoza Precordillera of western Argentina.I continue to work on Ordovician spiculesponges, sponge fauna and most recently,nautiloid associations from the Precordillera.I am working on several joint projects inthese subjects with S. Heredia (Conodonts)and S. Peralta (Graptolites).

BRUSSA, EDSEL D. (Argentina) is workingon Ordovician graptolites from thePrecordillera basin; a review of theUndulograptus austrodentatus Biozone indifferent localities is in advance. Middle andUpper Ordovician graptolite faunas are beenstudied with Chuck Mitchell and BlancaToro. I am also studying graptolites from thePuna region (FONCYT Project directed byJ. Luis Benedetto) and integrating data forother FONCYT Project directed by TeresaS�nchez about the Ordovician RadiationBioevents from Western Argentina.


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BRUTON, DAVID L. (Norway) is working onearly Ordovician trilobites from Iran, andhave works in press dealing with trilobitesfrom the Cambrian of the Oslo Region,Permian of Spitsbergen and the DevonianHunsr�ck Slate.

CARRERA, MARCELO G. (Argentina) isactively working on biogeography andevolutionary history of Ordovician sponges.I'm also working on different aspects of theOrdovician radiations along with TeresaS�nchez and Beatriz Waisfeld in the contextof the Great Ordovician Biodivesificationevent (GOBE) IGCP project 410. M ystudies also focus on taxonomy,paleoecology and paleobiogeo-graphy of theOrdovician sponges and bryozoans of theArgentine Precordillera.

CHOI, DUCK K. (Korea) is mainly workingon the Cambrian-Ordovician trilobites ofKorea. During the last couple of years,special attention has been given to the LowerOrdovician pandemic trilobites from theMungog Formation to understand theirpaleogeographic implications (with D.H.Kim). Last year I was deeply involved in theIGCP 410 Korea Meeting which was held at8-11 September, 1998: one-day indoormeeting at Seoul National University andthree-day field trip to the Ordoviciansequences of South Korea.

ETHINGTON, R. L. (U.S.A.) is working onconodonts from the Manitou Formation inColorado, from the Au Train Formation inthe Upper Peninsula of Michigan, and fromthe Oneota Dolomite and Blue EarthSiltstone of the Upper Mississippi Valleyregion. Continuing projects are concernedwith the Ibexian-Whiterockian conodonts ofthe Great Basin, southern Oklahoma, andthe Ouachita Mountains.

FERRETTI, ANNALISA (Italy) is continuingher work on Late Ordovician conodonts fromsome European spots. A global report withEnrico Serpagli on conodont faunas fromSardinia (Italy) is in press, as well as a paperwith Chris Barnes and Enrico Serpagli withconsiderations on the evolution of the genusAmorphognathus recorded by the Whitlandsection (south Wales). The new Valbertadsection in the Italian Carnic Alps,preliminary described in the occasion of theECOS VII conodont meeting, will becarefully and now more quietly investigatedwith Gabriella Bagnoli and Enrico Serpagli.

FINNEY, STANLEY C. (U.S.A.) reports theresults of a multi-disciplinary study of LateOrdovician sections in central Nevada arebeing published with the first key paperappearing in Geology. Funding is beingsought to extend this research to additionalsections in the Great Basin. Stan continues1) his work mapping Ordovician toDevonian strata in mountain ranges ofcentral Nevada, 2) his joint efforts withJames Gleason on neodymium chemo-stratigraphy of Upper Ordovician sectionsin the Ouachita and Appalachian mountains,and 3) his joint efforts with George Gehrelson provenance of Ordovician quartzsandstones in Cordilleran orogen. Morerecently, Stan joined forces with StigBergstrom and Dan Goldman to re-examinethe graptolite biostratigraphy of the lowerUpper Ordovician in North America. SilvioPeralta will join Stan in August to Octoberto study lower Upper Orodoviciangraptolites from the Ouachita Mountainsand the Great Basin. Along with StigBergstrom and Chen Xu, Stan continues toevaluate candidate stratotype sections forthe base of the N. gracilis Zone. LastAutumn, they visited the Pingliang section inGansu Province, China, and in April 1999,Stan will recollect and study the classicsuccession at Fagelsang, Sweden.


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FORDHAM, BARRY G. (Australia) continuesworking on mid-Paleozoic time scales andconodont biostratigraphy of the Ordovicianto Lower Carboniferous of the YarrolProvince (central Queensland, Australia).

GONCUOGLU, YAKUT (Turkey) is currentlyworking on stratigraphy and correlation inLower Ordovician of Turkey. Some paperson conodont stratigraphy (with Dr. H.Kozur) resulting from my work in theTaurides have been submitted to Europeanjournals. I am also involved in the LowerPaleozoic projects of the Geological Surveyof Turkey.

HEREDIA, SUSANA (Argentina) is activelyworking on Llandeilian conodonts fromSierra Pintada, Southern Mendoza andArenig-Llanvirn conodonts from San JuanProvince, Argentina.

HINTZ, LINDA (Estonia) is actively workingon Ordovician faunas, mainly onbrachiopods in the frame of the project"Changes of the Ordovician biotas along anonshore-offshore transect in the BalticPalaeobasin and their biostratigraphicinterpretation" (Project No 3516; 1998-2000) supported by the Estonian ScienceFoundation. The special goals of this projectlead by me are 1) clarify the trends of biotasdifferentiation along the environmentalgradient and analyze relations betweenmacro- and microfaunal associations, 2)work out palaeontological criteria foridentification of stratigraphical boundariesalong the profiles with variable fauna andfacial composition, 3) investigate spatial andtemporal extent of stratigraphical gaps andevaluate their importance for ecosystem andfacial models, 4) present new data on thetaxonomy, palaeoecology and possiblestratigraphical applicability of some up tonow poorly studied faunal groups

(scolecodonts). My colleagues Jaak Nolvak,Olle Hints, Helje Parnaste and Aile Korts areinvolved in the project. Data on thetaxonomic composition and distribution offaunas present a contribution to the IGCPProject No 410. 1998 was a last year of theproject led by D. Kaljo. In the frame of thisproject two manuscripts are preparedtogether with D. Kaljo, J. Nolvak, O. Hintsand T. Martma concerning the carbonisotope excursions and coeval biotic-environmental changes in the Baltic Basin.

HINTZ, OLLE (Estonia) is continuing hisstudy on different aspects on fossil jaw-bearing polychaetes. The emphasis iscurrently on the Ordovician material ofBaltoscandia as this is the subject of myPh.D. thesis which will be completed inthree years. I take part in two projects leadby D. Kaljo and L. Hints. Study of someaspects of organic-walled microfossils andregional stratigraphy in collaboration with J.Nolvak and M. A. Zuikov (St. Petersburg)are also in progress. Two papers onscolecodonts appeared in 1998 and some aresubmitted for publication, or in final stage ofpreparation.

JOWETT, DAVID M. S. (Canada) is workingon latest Ordovician-Early Silurianconodonts from the Franklinian Miogeoclineof Cornwallis Island, Arctic Islands, Canada(M.Sc., Dr. C.R. Barnes, supervisor)Ê Thefieldwork, led by Dr. M. Melchin, wascompleted this summer, with field supportby the Polar Continental Shelf Project andthe Geological Survey of Canada. The aimsare to construct a high-resolution conodontbio-stratigraphy to integrate with the alreadywell-established graptolite zones. Inaddition, we hope to interpret our findings inlight of the Silurian ocean / climate statemodels, oxygen and carbon isotopeexcursions, and the effects of the TerminalOrdovician glaciation.Ê Ê


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KALJO, DIMITRI (Estonia) is workingtogether with colleagues (see publications)on the upper Ordovician stratigraphy andfaunas of Estonia. My primary interestsinclude carbon isotope event markers andrugose corals. Recent studies show thatbelow the well-known Hirnantian carbonisotope peak (5-7 per mille) there occur 3-4low (ca. 2 per mille) positive delta 13Cexcursions (middle and upper Caradoc, lowerAshgill). Some correlation with biotic andenvironmental changes can be traced.

KRAFT, JAROSLAV (Czech Republic)described some new dendroids fromBohemian Lower Ordovician. In cooperationwith Petr Kraft he studied new material ofthe Lower Ordovician graptolites fromBohemia and proposed a revisedbiostratigraphical scheme of the BohemianLower-Middle Ordovician. Together withPetr Kraft, Olda Fatka and Rudolf Seidl, hedescribed the first kiaerograptid andassociated fossils from Bohemia.

KRAFT, PETR (Czech Republic) worked asan Alexander von Humboldt-FoundationResearch Fellow at the Technical Univ.Berlin in Bernd ErdtmannÕs Berlindepartment. He studied new material of theLower Ordovician graptolites from Bohemiawith Jaroslav Kraft. The oldest Bohemiangraptoloid was found and described withJaroslav Kraft, Olda Fatka (associatedchitinozoans) and Rudolf Seidl (privatecollector). Some comparable studies havebeen started on graptolites from Bolivia(with Bernd-D. Erdtmann) and Oslo Region(with Jorg Maletz). A revisedbiostratigraphical scheme of Lower-MiddleOrdovician in Bohemia was proposedtogether with Jaroslav Kraft. A revision andsome new interpretations of the oldestchatetognath is under preparation withOliver Lehnert and Jiri Fryda.

KOZUR, HEINZ (Hungary) is working on theOrdovician of Turkey: conodonts, ostracods,Muellerisphaerida, radiolarians, stratigraphy,paleogeography. He is also studyingOrdovician radiolarians and conodontsworld-wide.

KUGLITSCH, JEFFREY J. (U.S.A.) isinterested in North American mid-contintentOrdovician and early Silurian ostracodes.

LEATHAM, W. BRITT. (U.S.A.) is currentlyworking with John Cooper on sequencestratigraphy and conodont biostratigraphyof the Tippecanoe Sequence in the southernGreat Basin of Nevada and California.

LEE, DONG-JIN (Korea) is actively workingon phylogeny and paleobiology of early(Ordovician) tabulates.

LEHNERT, OLIVER (Germany) is working,for the next 2 years, on Ordovician conodontbiostratigraphy in the Pogonip Group andthe Eureka Quartzite in Southern Nevadaand Eastern California and hopes that astudy of conodonts from the Ely SpringsDolomite in this region will follow. Theconodonts should help to check the sequencestratigraphy in these Òforgotten dolomitesÓof the southern Great Basin. However, I amnot giving up interest in studying Cambro-Ordovician faunas from South America andtheir paleogeographical affinities. Withcolleagues and friends I am also working onaspects of some associated microfossilgroups.

LESLIE, STEPHEN A. (U.S.A.) most recentresearch has involved the conodontbiostratigraphy, sequence stratigraphy, andevent stratigraphy of the Middle OrdovicianJoachim Dolomite in the Ozark Region ofNorthern Arkansas. This project has nowbeen expanded in stratigraphic range and


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scope to incorporate the use of conodontgraphic correlation in determiningMowhawkian and Cincinnatian sea-levelchanges along the southern margin of theOzark Dome. Other active projects includethe analysis of possible K-bentonite beds inthe Ordovician deep water facies of theOuachita Mountains, the use of stableisotopes from biogenic apatites andcarbonate rocks around the Deicke andMillbrig K-bentonite beds in an attempt tostudy the dynamics of paleoseawater of theMohawkian epieric sea in Laurentia (withChris Holmden, Univ. of Saskatchewan, andStig Bergstr�m, Ohio State), and continuedinterest in the conodont faunas of theIndependence Mountains, Elko County, NV.

L�FGREN, ANITA (Sweden) is currentlyworking on stratigraphy and correlation inthe upper Arenig of Baltoscandia. Somepapers on conodont taxonomy resultingfrom this are being published (on"ScolopodusÓ peselephantis, Semiacontioduscornuformis and Cornuodus longibasis). ButI have also been busy with some otherprojects: together with Ray Ethington andJohn Repetski I have just finished a paperon "Oneotodus" variabilis and otherconiform taxa with trans-Iapetus distributionin the Tremadoc, and I am also working on apaper with Tania Tolmacheva onParacordylodus gracilis. Another veryinteresting project is continued work on theM�ekalda section in Estonia with ViiveViira.

M�NNIK, PEEP (Estonia) is actively workingon the evolution, ecology and taxonomy ofOrdovician and Silurian conodonts fromBaltic, Arctic regions and Siberia, and on theconodont-based high-resolution stratigraphy.Joint studies of the distribution ofconodonts and graptolites in Baltic are goingon together with Dr. D. Loydell fromPortsmouth, U.K. Since the beginning of

1998 I am acting as a co-leader of the IGCPProject 406 "Circum-Arctic Lower andMiddle Palaeozoic Vertebrate Palaeontologyand Biostratigraphy".

MçNGANO, MARIA G. (Argentina) isworking on sedimentology and ichnology ofOrdovician marine clastic successions ofnorthwest Argentina. I am particularlyinterested in ichnofacies models of tide-dominated shallow marine deposits, theimplications of tidal-flat ichnofaunas inevolutionary paleoecology, and volcani-clastic facies and depositional evolution ofthe Famatina Basin.

MEIDLA, TÍNU (Estonia) is continuing hisstudies on the Ordovician of Baltoscandiaand on taxonomy and distribution of theOrdovician ostracodes. The activities aredivided between late Ordovician (ostracodes,glaciation event and chemostratigraphy,together with J. Marshall and P. Brenchley),mid-Caradoc (oceanographic event andrelated aspects in Baltoscandia, togetherwith L. Ainsaar, L. Hints, O. Hints, T.Martma, J. N�lvak) and Billingenian -Volkhovian (ostracodes stratigraphy, faciesand sea level in Baltoscandia, together withL. Ainsaar, A. Dronov and O. Tinn).

MIKULç, (MIKULAS) RADEK (CzechRepublic) is working on ichnologicalevaluation of the Ordovician in theBarrandian area (Czech Republic). Ê

NOLVAK, JAAK (Estonia) is actively workingon Ordovician chitinozoans andbiostratigraphy from the Baltoscandiansections with my Estonian colleagues andour co-operation with Yngve Grahn andFlorentin Paris continues. Current researchconcerns also the study of one polish sectionin co-operation with Zdzislaw Modlinski.


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NOWLAN, GODFREY S. (Canada) is activelyworking on a number of projects: 1,Conodonts from the Cambro-OrdovicianDeadwood Formation in Alberta,Saskatchewan and North Dakota; 2,Conodont biostratigraphy and isotopestratigraphy (with C. Holmden, Universityof Saskatchewan) from the middle to lateOrdovician and Early Silurian of theWilliston Basin and Hudson Bay Basin ofcratonic North America; 3, Conodontbiostratigraphy of the Ordovician GlenogleFormation of British Columbia; 4, AsSecretary of the Cambro-OrdovicianBoundary Working Group, I am working onthe final draft of the proposal of the GSSPfor the base of the Ordovician at Green PointNewfoundland (with Roger Cooper); 5,Continuing biostratigraphic service work onCambrian, Ordovician and Silurianconodonts from all parts Canada.

ORTEGA, GLADYS (Argentina) is involved indiverse projects regarding graptolitetaxonomy, biostratigraphy and paleo-biogeography from Ordovician-Silurianstrata of the Argentina Precordillera(particularly, in a new project on highresolution conodont-graptolite bio-stratigraphy together with G.L. Albanesi,M.A. H�nicken and C.R. Barnes). Newadvances were made on the LowerOrdovician graptolite biostratigraphy of theCordillera Oriental, and the Famatina Range,Northwestern Argentina, by means of tworecently accomplished projects granted byCONICET and CONICOR whichparticipated several Argentina workers (ondiverse paleontological groups) fromdifferent Argentine Universities. Some othergraptolite related works are being carried outwith colleagues from Spain and France.

PALSSON, CHRISTIAN (Sweden) is currentlyworking on Middle and Upper Ordoviciangraptolites and biostratigraphy in Sweden.

At present, I am focusing on the P. linearisZone in a drill-core from central Scania,southern Sweden.

PERALTA, SILVIO H. (Argentina) is currentlyworking on upper Ordovician marinesequences (N. gracilis Zone) from WesternArgentina Precordillera, San Juan Province.From a biostratigraphical point of view, thisstudy involves mainly graptolite faunas ofthe Los Azules Black Shales (CentralPrecordillera) and of the AlcaparrosaFormation (Western Precordillera); likewise,the siliciclastic deposits of the La CanteraFormation and carbonate and mixedcarbonate-siliciclastic deposits of the LasAguaditas Formation. Paleoenvironmentaland tectonosedimentary evolution of theupper Ordovician basin of Precordillera areconsidered in such studies. Moreover, IÕmworking on early Ordovician carbonate andmixed carbonate-siliciclastic sequences of theGualcamayo Formation and its correlativeswhich bear graptolites and/or conodontfaunas, associated with several other formssuch as trilobites, brachipods, sponges,bryozoans, and palynomorphs. In this case,conodont studies are being carried out bySusana Heredia (Comahue University,Neuquen Province), microfacies by MatildeBeresi (CONICET-CRICYT, MendozaProvince), and palynomorphs (acritarchs andchitinozoan) by Elba Diana Pothe de Baldis(Institute of Geology - San Juan University).

IAN PERCIVAL (Australia) is now doingmore conodont research than studyingbrachiopods and molluscs, although thelatter are not being neglected. Two shortpapers have just been published (inQuarterly Notes of the Geological Survey ofNew South Wales, 1999), illustratingOrdovician conodonts from the northernLachlan Fold Belt in central NSW, while apaper (with co-authors Y. Zhen, R. Nicoll,B. Webby, A. Hamedi, and I. Stewart)


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describing Appalachignathus, Bergstroemo-gnathus, and Rhipidognathus from Australiaand Iran is about to be submitted. Workcontinues on a manuscript (with Zhen andWebby) on Early Ordovician conodontsfrom the Hensleigh Formation of NSW. I amalso studying conodont assemblages of latestCambrian - early Ordovician age from far-western NSW in order to establish abiostratigraphic framework for this poorly-known region. Invertebrate faunas fromMiddle and Late Ordovician strata across theLachlan Fold Belt are being prepared forpublication with collaborators B. Webby andJ. Pickett in one instance, and M.Engelbretsen and G. Brock of MacquarieUniversity working with me describinglingulate, acrotretide and discinidebrachiopods in another project. I am activelyinvolved in the IGCP 410 project, andattended the Korea and South Chinameetings in September 1998.

PYLE, LEANNE (Canada) is currentlyworking on my thesis entitled "UpperCambrian to Lower Silurian Stratigraphy andConodont Biostratigraphy and Paleoecologyof Platform to Basin Facies, NorthernBritish Columbia" as a Ph.D. candidateunder the supervision of Dr. C. R. Barnes.

RONG JIA-YU (China) and his colleagues areworking on three subject: 1. Proposal of AGSSP candidate section in the YangtzePlatform region, South China, for a newHirnantian boundary stratotype with ChenXu, David Harper, and Chuck Mitchell. 2.Study of the Late Ordovician brachiopodsuccession with a special references to theFoliomena Fauna. A paper on The LateOrdovician (Caradoc-Ashgill) brachiopodfaunas with Foliomena based on data fromChina was submitted to Palaios in 1998. Itwas completed by Rong Jia-yu, Zhan Ren-bin and Dave Harper. 3. Study of thesurvival and recovery of the early Silurian

brachiopod in South China by Rong Jia-yuand D. A. T. Harper.

RÍÍMUSOKS, ARVO (Estonia) is currentlyinvolved in studies on the chasmopinetrilobites and strophomenides of theOrdovician of northern Estonia.

RUBINSTEIN, CLAUDIA V. (Argentina) iscurrently investigating acritarch andchitinozoan biostratigraphy and paleo-geography in the upper Tremadoc-Arenig ofthe Cordillera Oriental, northwesternArgentina, in collaboration with Blanca Torofrom C�rdoba, Argentina (graptolites) andBeatriz Waisfeld from Buenos Aires,Argentina (trilobites).

SALAS, MARêA J. (Argentina) is working onher Ph.D. thesis about the taxonomic, bio-stratigraphic and paleogeographic aspects ofthe Ordovician ostracode faunas from thePrecordillera basin, western Argentine.

SçNCHEZ, TERESA M. (Argentina)continues working on Ordovician bivalvesfrom western Argentina. I also continueresearch on biodiversification patterns ofOrdovician associations from westernArgentina (with Beatriz Waisfeld, MarceloCarrera, Juan L. Benedetto), as a part of theIGCP Project 410 (The Great OrdovicianBiodiversification Event). Short paperssummarising some aspects of the currentresearch (environmental control on biofacies,and faunal turnover) have been submitted tothe 8th ISOS and should be available inPrague, in June.

SANSOM, IVAN J. (United Kingdom) iscurrently writing up a number of pieces ofwork relating to research into thepalaeobiology, palaeoecology andstratigraphic occurrence of Cambro-Ordovician fish, in collaboration with PaulSmith (Birmingham UK) and Moya Smith


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(UMDS, London). These include detailedstudies of Ordovician ichthyolith remainsfrom the Harding Sandstone and relatedfacies in the western USA. This work iscurrently being expanded to study thepatterns of fish evolution across theOrdovician-Silurian boundary.

SZANIAWSKI, HUBERT (Poland) is workingon the early evolution of conodonts andprotoconodonts, especially Late Cambrianand Early Ordovician.

SARMIENTO, GRACIELA N. (Spain) isactively working on Ordovician conodontsfrom the Iberian Peninsula, Morocco andTurkey.

SERPAGLI, ENRICO (Italy) together withother projects, is continuing his bio-stratigraphic work on Late Ordovicianconodonts, mostly from Sardinia and theCarnic Aps.

SMITH, PAUL (United Kingdom) is workingon the Ordovician of Greenland and Svalbardand on the phylogeny and palaeobiology ofOrdovician vertebrates

STOUGE, SVEND (Denmark) is currentlyworking with the Lower to Lower UpperOrdovician conodont succession from theeast Baltic region in collaboration withcolleagues from Estonia and Russia. Theconodont work on Lower Ordovicianconodonts from Sweden and in collaborationwith G. Bagnoli is still in progress. I am alsoworking on the Cambro-Ordoviciansuccessions in North Greenland .

SYCHEV, OLEG V. (Russia) is activelyworking on the Ordovician lithology andfacies of the Siberian Platform. Lithofaciesmaps and paleoenvironment reconstructionhave been accomplished for five stratigraphiclevels of Early Ordovician. At present I am

engaged in the description of the Ordovicianreference sections of the northern SiberianPlatform.

TERENTIEV, SERGEY S. (Russia) is workingon the morphology, paleoecology anddistribution of Middle Ordovicianechinoderms from north-west Russia.Current work is with Michael Zuykov onthe early Caradoc faunal association of theEast Baltic.

TINN, OIVE (Estonia) is currently workingon Arenigian ostracodes of Baltoscandia.

TORO, BLANCA A. (Argentina) continuesworking on taxonomic, biostratigraphic andpaleogeographic aspects of graptolite faunasfrom northwestern Argentina. Graptolitedata belonging to Famatina Range andEastern Cordillera are integrated inFONCYT Project directed by J. LuisBenedetto.

TORTELLO, M. FRANCO (Argentina) isactively working on systematics andbiostratigraphy of Uppermost Cambrian-Lower Ordovician trilobites of northwesternArgentina. A manuscript (with S. B.Esteban) on trilobites and graptolites fromthe Cambrian-Ordovician transition in theVolcancito Formation (Famatina System, LaRioja Province) was submitted. A shortpaper on the occurrence of the genusPsilocara (Trilobita, Olenidae) in the LowerArenig of the Parcha Formation (EasternCordillera, Salta Province) is ready forpublication. Other projects on Tremadocfaunas from Eastern Cordillera are inprogress.

VANDENBERG, FONS (Australia) is currentlyengaged in writing two comprehensivereviews of the Ordovician of southeasternAustralia, one for the forthcoming edition of"Geology of Victoria" (to be published in


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2000) that concentrates on stratigraphy,depositional environments and basinanalysis. This is co authored by ChrisFergusson. The other will be published in abook provisionally titled "Tasman Fold Beltin Victoria" and also considers the broadertectonic aspects of SE Australia in the lowerPalaeozoic. It is to be published this year.

VIIRA, VIIVE (Estonia) is still working onOrdovician and Silurian conodonts.Research on Ordovician conodonts currentlyinclude 1) study of Maekalda section(Arenig-Llanvirn) together with AnitaL�fgren, 2) Biostratigraphy of Cambrian-Ordovician boundary beds with Ivar Puura,3) Paper with Stephanie Barrett onconodonts of Kohtla oil shale section(Caradoc) is nearing completion.

VILLAS, ENRIQUE (Spain) is presentlyworking on the brachiopods of Tremadoc agefrom Vogtendorf Formation in Germany,with Wolfgang Hammann and Klaus Sdzuy,who are studying the trilobites andechinoderms. I am also preparing a paper onthe Ashgill brachiopod Foliomena Faunafrom Sardinia (Italy) along with WolgangHammann and David A.T. Harper. I havestarted a close cooperation with theArgentine Guillermo Ace�olaza, GuillermoAlbanesi, Zarela Herrera, Gladys Ortega andFranco Tortello, to study the LowerOrdovician successions from the CordilleraOriental Argentina. At present I am studyinga Tremadoc brachiopod collection of the areastored at the Museo de Paleontologia of theUniversidad Nacional de C�rdoba(Argentina).

WAISFELD, BEATRIZ G. (Argentina) iscurrently working on Ordovician trilobitedominated association from North-westernArgentina. Studies on Ordovician radiationgo on along with Teresa S�nchez andMarcelo Carrera. Moreover, work on

Ordovician silicified faunas from Argentinacontinues jointly with Emilio Vaccari, BrianChatterton and Greg Edgecombe.

WILLIAMS, S. HENRY (Canada) is spendingthe year at the Geological Survey of Canadain Calgary while on sabbatical leave. He isusing the time to try to clear some of thebacklog of research which has beendeveloping over the past few years. So far,papers have been submitted dealing with theform of the graptolite prosicula (with LornaClarke, a B.Sc. Honours student), theOrdovician of the Hamburg klippe aroundHarrisburg, Pennsylvania (with Bob Ganisand John Repetski) and a synthesis of recenthydrocarbon exploration in westernNewfoundland (with Mark Cooper ofPanCanadian and numerous other authors).He has also been restudying the faunas ofthe Tremadoc-Arenig boundary at CowHead, including chemically isolated (HF)graptolites from the shales, conodonts fromthe so-called "barren interval" (with GodfreyNowlan and Chris Barnes) and chitinozoans(with Randy Batten, an M.Sc. student atMemorial University). Henry is alsoplanning to carry out some taxonomic workon some of the Yapeenian and Darriwiliangraptolites of the Glenogle Shale in theCanadian Rockies, utilized by Brian Norfordand Dennis Jackson in their recentlycompleted study of that unit.

WILSON, MARK A. (United Kingdom) isworking with Paul Taylor (Natural HistoryMuseum, London) on Ordovician bryozoanevolution and paleoecology. I am alsocontinuing investigations of Ordovicianhardgrounds and the evolution of theirencrusting and endolithic faunas.

YADRENKINA, ANASTASIYA (Russia) isactively working on the Ordovicianbrachiopods and stratigraphy of the SiberianPlatform. Nowadays I have finished the


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description of the Ordovician brachiopodsfrom the northern Siberian Platform intendedfor the collective work ÒOrdovician andSilurian fauna of the northern SiberianPlatformÓ edited by Yu. I. Tesakov. Atpresent I am working on the description ofthe Ordovician reference sections of theSiberian Platform. The description of themost complete Ordovician sectionspenetrated in the wells drilled on thenorthern Siberian Platform is given for thefirst time.

ZUYKOV, MICHAEL (Russia) is continuinghis work on Ordovician brachiopods fromthe East Baltic. A manuscript on the genusPlatystrophia from the Arenig-Llanvirn ofnorthwest Russia has been submitted forpublication to Proceedings of the EstonianAcademy of Sciences. He is also working onthe various aspects of the Ordovician(Caradoc) faunas and sedimentology of theEast Baltic together with colleagues SergeyTerentiev and Marina Tugarova and incooperation with Olle Hints. His M.Sc.thesis defence is in June 1999, after which hewill continue his work as a Ph.D. student.

RECENT ORDOVICIANPUBLICATIONS

ACE�OLAZA, F. G. AND A. TOSELLI. 1998.The Precordillera Argentina: an Alloch-tonous or Autochtonous Gondwanic?, TerraNostra. Bayreuth.ACE�OLAZA, G. F. 1998. Graptolites,conodonts and trilobites of uppermostCambrian and Lower Ordovician age fromJujuy Province, northern Argentina, p. 145-147. In: J.C. Guti�rrez Marco and I R�bano(eds.), Proceedings 6th InternationalGraptolite Conference (GWG-IPA).Instituto Tecnol�gico Geominero de Espa�a,Temas Geol�gico-Mineros, 23, Madrid.

ACE�OLAZA, G. F. 1998. Observacionesestratigr�ficas y bioestratigr�ficas en lasunidades Cambro-Ordov�cicas de laProvincia de Jujuy, Rep�blica Argentina.Stratigraphic and biostratigraphicobservations on the Cambrian-Ordovicianboundary in Jujuy Province, NorthernArgentina. Geogaceta 24: 3-7, Madrid.ACE�OLAZA, G. F. 1998. Macrocystella(Echinodermata - Rhombifera) in theCambrian-Ordovician of northern Argentina.Terra Nostra.ACE�OLAZA, G. F. AND G. L. ALBANESI.1997. Conodont-trilobite biostratigraphy ofthe Santa Rosita Formation (Tremadoc) fromChucalezna, Cordillera Oriental, NorthernArgentina. Reuni�n de comunicaciones de laAsoc. Paleontol�gica Argentina, C�rdoba.Abstracts, Ameghiniana 34 (1): 113.ACE�OLAZA, G. F. AND J. C. GUTI�RREZ-MARCO. 1998. Helminthopsis abeliKsiazkiewicz, un icnof�sil del Ordov�cicoSuperior de la Zona Centroib�rica espa�ola.Helminthopsis abeli Ksiazkiewicz, anichnofossil from the Upper Ordovician ofthe Central Iberian zone (Spain). Geogaceta24: 7-10, Madrid.ACE�OLAZA, G. F. AND J. C. GUTI�RREZ-MARCO. 1998. Estructuras de fijaci�n depelmatozoos (Equinodermos) en elOrdov�cico Medio de la Zona Centroib�ricaespa�ola. On some pelmatozoan holdfasts(Echinodermata) from the MiddleOrdovician of the Central Iberian Zone,Spain. Coloquios de Paleontolog�a, 49: 23-40, Madrid.ACE�OLAZA, G. F. AND D. POIR�. 1998.Trace fossils and sedimentology of RupascaFormation (Lower Ordovician) inChucalezna, Jujuy Province, northernArgentina. Terra Nostra.ALBANESI G. L. 1998. Biofacies deconodontes de las secuencias ordov�cicas delcerro Potrerillo, Precordillera Central de SanJuan, R. Argentina. Actas XII AcademiaNacional de Ciencias., C�rdoba: 75-98.


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ALBANESI G. L. 1998. Taxonom�a de cono-dontes de las secuencias ordov�cicas del cerroPotrerillo, Precordillera Central de San Juan,R. Argentina. Actas XII Academia Nacionalde Ciencias., C�rdoba: 101-253.ALBANESI G. L. AND C. R. BARNES. 1996.The origin of the Middle Ordovicianconodont Paroistodus horridus in theArgentine Precordillera. Sixth InternationalConodont Symposium. Polish Academy ofSciences, Institute of Paleobiology.Warszawa, Potand. Abstracts: 1.ALBANESI G. L., J. L. BENEDETTO AND P-Y. GAGNIER. 1995. Sacabambaspis janvieri(Vertebrata) y conodontes del Llandeilianotemprano en la Formaci�n La Cantera,Precordillera de San Juan, Argentina. Bol.Acad. Nac. Cs., C�rdoba. 60 (3-4): 519-544.ALBANESI G. L., M. A. H�NICKEN AND C.R. BARNES. 1998. Bioestratigraf�a deconodontes de las secuencias ordov�cicas delcerro Potrerillo, Precordillera Central de SanJuan, R. Argentina. Actas XII AcademiaNacional de Ciencias, C�rdoba: 7-72.ALBANESI G. L., M. A. H�NICKEN AND G.ORTEGA. 1995. Amorphognathus aff.superbus (Conodonta) en la Formaci�nTrapiche (Ordov�cico Superior), cerroPotrerillo, Departamento J�chal, Provinciade San Juan, Argentina. Bol. Acad. Nac. Cs.,C�rdoba. 60 (3-4): 461-468. ALBANESI G. L., M. A. H�NICKEN AND G.ORTEGA. 1995. Review of OrdovicianConodont-Graptolite Bioestratigraphy ofthe Argentine Precordillera. In: Cooper, J.D.;Droser, M.L. and Finney, S.C. (eds.).Ordovician Odyssey: Short Papers for the7th Intern. Symposium on the OrdovicianSystem, Las Vegas, SEPM: 31-36.ALBANESI G. L. AND G. ORTEGA. 1998.Conodont and Graptolite Faunas from theLas Plantas Formation and equivalent units(Caradoc) in the Argentine Precordillera.ECOS VII (Seventh International ConodontSymposium Held in Europe), Bologna-Modena, Italia. Abstracts: 1-2.

ALBANESI G. L. AND G. ORTEGA. 1998.La Biofacies Periodon-Pygodus (Conodonta)en las secuencias eux�nicas del Ordov�cico dela Precordillera Argentina. Enviado al VIICongreso Argentino de Paleontolog�a yBioestratigraf�a, Bah�a Blanca. Resumen: 79.ALBANESI G. L., G. ORTEGA AND M. A.H�NICKEN. 1995. Conodontes y graptolitosde la Formaci�n Yerba Loca (Arenigiano-Llandeiliano) en las quebradas de Ancauchay El Divisadero, Precordillera de San Juan,Argentina. Bol. Acad. Nac. Cs., C�rdoba. 60(3-4): 365-400.ALBANESI G. L., G. ORTEGA AND M. A.H�NICKEN. 1998. High resolution conodont- graptolite biostratigraphy controlling thediachronous boundary between the San Juanand Gualcamayo formations (Arenig-Llanvirn) in the Argentine Precordillera.ECOS VII (Seventh International ConodontSymposium Held in Europe, Bologna-Modena, Italia. Abstracts: 2-4.ALBANESI G. L., G. ORTEGA, M. F.TORTELLO AND G. F. ACE�OLAZA. 1997.Conodontes, graptolitos y trilobites de laFormaci�n Parcha en la Cordillera Orientalde Salta, R. Argentina. Reuni�n comunic.Asoc. Paleontol�gica Argentina, C�rdoba.Abstracts, Ameghiniana 34 (1): 114.ALBANESI G. L. AND R. I. RAO. 1996.Conodont fauna from the Santa GertrudisFormation (Middle-Later Ordovician),Eastern Cordillera, Northwestern Argentina.Polish Acad. Sciences, Inst. of Paleobiol.Warszawa, Poland, Abstracts: 3.ALBANESI, G. L. AND N. E. VACCARI.1994. Conodontos del Arenig en laFormaci�n Suri, Sistema del Famatina,Argentina. Rev. Espa�ola de Micropaleont.XXVI (2): 125-146.ALBANI, R., G. BAGNOLI AND S. STOUGE.1998. Chitinozoans assemblages dynamicsduring tectonic instability - Cape CormorantFormation (Llanvirn), western Newfound-land. In:CIMP Symposium and Workshops,Programme and Abstracts, Pisa 1998, 35.


39

ALDRIDGE, R. J., H. A. ARMSTRONG, J. E.BARRICK, L. JEPPSSON, AND P. M�NNIK.1998. Conodont extinctions anddiversifications: the Silurian scene.Abstracts of the Pander Society Meeting,Columbus, Ohio, March 19-20, 1998.ARMSTRONG, H. A. 1999. Quantitativebiostratigraphy. In: D. A. T. Harper (ed.),Numerical techniques Palaeontology.Chapman and Hall.ARMSTRONG, H. A., A. W. A. RUSHTON,A. W. OWEN, AND J. D. FLOYD. 1998.Biostratigraphy of the Currarie Formationon the northwestern edge of the SouthernUplands: implications for the cessation ofbasic volcanism. Scottish Journal of Geology34, 119-125.ASTINI, R. A., 1998. El Conglomerado deLas Vacas y el Grupo Trapiche de laPrecordillera: tect�nica distensiva en elOrdov�cico Superior. Revista de laAsociaci�n Geol�gica Argentina. 53: (4).ASTINI, R. A., 1998. El Ordov�cico en laregi�n central del Famatina (provincia de LaRioja, Argentina): aspectos estratigr�ficos,geol�gicos y geotect�nicos. Rev. Asoc.Geol. Arg. 53: (4).ASTINI, R. A., 1998. Stratigraphic evidencesupporting the rifting, drifting and collisionof the Laurentian Precordillera terrane ofwestern Argentina. En: Pankhurst, R.J. andRapela, C.W. (Eds.), The Proto-Andeanmargin of Gondwana. Geological Society ofLondon Spec. Publ. 142: 11-33.BABCOCK, L. E., CHINA ZHANGWENTANG; S. A. LESLIE, J. M. ST. JOHN,AND A. M. GRUNOW. 1998. Fossil record ofthe Neoproterozoic - Cambrian faunaltransition: Interplay of biological, geological,chemical, and astronomical factors.Geological Society of America, Abstractswith Programs, 30 (7): A-29.BAGNOLI, G. 1998 (ED.). ECOS VIIAbstracts, Bologna-Modena 1-136 pp.,Tipografia Compositori Bologna.

BAGNOLI, G., A. FERRETTI, E. SERPAGLIAND G. B. VAI. 1998. Late Ordovicianconodonts from the Valbertad Section(Carnic Alps). In: M. C. Perri and C.Spalletta (Eds), Southern Alps Field TripGuidebook, ECOS VII, Giornale di Geologia,60, Spec. Issue: 138-149, 7 text-figs., 2 pls.,Bologna.BARNES, C. R. 1998. Living on the edge: thepattern of Early Ordovician conodontbiofacies, circum northern Laurentia. 7thEuropean Conodont Symposium, Bologna-Modena. Abstracts: 9.BARNES, C. R. 1998. Post-rift evolution ofthe margins of Northern Laurentia during theOrdovician: Evidence from stratigraphic andconodont paleontologic data. GeologicalSociety of America, Program with Abstracts:A-150.BARNES, C. R. 1998. Conodont extinctionevents in the Ordovician. Geological Societyof America, North Central Section, AnnualMeeting Program with Abstracts: 10BARNES, C. R., A. FERRETTI, AND E.SERPAGLI. 1998. Upper Ordovicianconodont faunas from south Wales. In: G.Bagnoli (ed.), ECOS VII Abstracts, Bologna-Modena, 1998, 1-2, 9-10.BARNES, C. R. AND L. PYLE. 1998. LowerPaleozoic stratigraphy and conodontbiostratigraphy, platform to basin transect inthe Trutch, Halfway River and Ware mapareas (94G,B,F). Geological Survey ofCanada, Central Foreland NatmapWorkshop, Abstracts, p. 24-25.BENEDETTO, J. L. 1998. Braqui�podosCaradocianos en los bloques de la diamictitaglacig�nica de la Formaci�n Don Braulio(Ashgilliano), Sierra de Villicum,Precordillera Argentina. Ameghiniana 35 (3):243-254.BENEDETTO, J. L. 1998. Early Ordovician(Arenig) brachiopods from the Acoite andSepulturas formations, Cordillera Oriental,northwestern Argentina. Geologica etPalaeontologica, 32: 7-27.


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BENEDETTO, J. L. 1998. Early Palaeozoicbrachiopods and associated shelly faunasfrom western Gondwana: its bearing on thegeodynamic history of the pre Andeanmargin. In: R. Pankhurst, and C.W. Rapela,The proto-Adean margin of Gondwana.Geological Society, London, Spec. Publ.,142: 57-83.BERESI, M. S. 1998. Oxfordian spongesfrom La Manga Formation, southernMendoza, Argentina Abstract, SimposioJur�sico superior de Am�rica del Sur In: VIICongreso Argentino de Paleontolog�a yBioestratigraf�a, pag. 149. Bah�a Blanca,Argentina.BERESI, M. S. AND S. HEREDIA. 1998.Una asociaci�n de microf�siles del C�mbricosuperior Cerro Pelado, Precordillera deMendoza. VII Cong. Arg. Paleont. yBioestrat., Resumen: 30. Bah�a Blanca,ArgentinaBERESI, M. S. AND S. HEREDIA. 1998. Amiddle Cambrian glauconitic condensedsection, San Isidro area, Mendoza,Precordillera, Argentina. Abstract, Volumen16th Latin American Conference onGeosciences: 14-15. October 14-16,Bayreuth, Alemania.BERESI, M. S., S. HEREDIA, AND M. A.H�NICKEN. 1998. El Ordov�cico calc�reode La Sierra de Las Higueras, Salagasta,Precordillera de Mendoza. VolumenReuni�n Argentina de Sedimentolog�a: 15-19.Salta, Argentina.BERGSTR�M, S. M., R. A. ASTINI, W. D.HUFF, C. CINGOLANI, E. D. BRUSSA, ANDD. R. KOLATA. 1998. The K-bentonite bedsuccession at Rio Gualcamayo in theGuandacol region, northern argentinePrecordillera: The most extensive ordovicianvolcanic ash bed complex exposed anywherein the world? IX Congreso Latinoamericanode Geolog�a. V. 2, 439-444. Buenos Aires.BERGSTR�M, S. M., S. C. FINNEY, X.CHEN, AND Z-H. WANG. 1998. The base ofthe Nemagraptus gracilis Zone as the base

of the global Upper Ordovician Series: Threepotential stratotypes, p. 148-152 in:Proceedings of the Sixth InternationalGraptolite Conference of the GWG (IPA)and the 1998 Field Meeting of theInternational Subcommission on SilurianStratigraphy (ICS-IUGS). InstitutoTecnologico Geominero de Espana, TemasGeol�gico-Mineros, 23, Madrid.BERRY, W. B. N., AND S. C. FINNEY. 1998.Significance of oceanic denitrification zonesfor graptolite occurrence, p. 152-153. In:J.C. Guti�rrez-Marco. and I. Rabano (eds.),Proceedings of the Sixth InternationalGraptolite Conference of the GWG (IPA).Instituto Tecnologico Geominero de Espana,Temas Geologico-Mineros, 23, Madrid.BRUSSA, E. D. 1997. Graptolitos delArenigiano tard�o-Llanvirniano de laFormaci�n Sierra de La Invernada, Pre-cordillera Occidental sanjuanina, Argentina.Parte 1. Ameghiniana, 34 (3): 357-372.Buenos Aires.BRUSSA, E. D. 1997. Graptolitos delArenigiano tard�o-Llanvirniano de laFormaci�n Sierra de La Invernada, Pre-cordillera Occidental sanjuanina, Argentina.Parte 2. Ameghiniana, 34 (3): 373-383.Buenos Aires.BRUSSA, E. D. AND R. A. ASTINI. 1998.The Gualcamayo River section: a graptoliteconstrained K-bentonite succession in theOrdovician of the Argentine Precordillera. In:J.C Gutierrez-Marco. and I. Rabano (eds.),Proceedings 6th International GraptoliteConference (GWG-IPA). InstitutoTecnol�gico Geominero de Espa�a, TemasGeol�gico-Mineros, 23: 154-157. Madrid.BRUSSA, E. D., C. MITCHELL AND R. A.ASTINI. 1998. Late Yapeenian to EarlyDarriwillian graptolite faunas from NazarenoCreek, Guandacol region, Precordillera,Argentina. In: J.C Gutierrez-Marco and I.Rabano (eds.), Proceedings 6th InternationalGraptolite Conference (GWG-IPA).Instituto Tecnol�gico Geominero de Espa�a,


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Temas Geol�gico-Mineros, 23: 158-160.Madrid.BRUTON, D. L., O. A. HOEL, T. B.LESSANU, AND A. YU. IVANTSOV. 1997.Catalogue of the trilobites in FriedrichSchmidt's "Revision der ostbaltischensilurischen Trilobiten" (1881-1907). Contri-butions from the Palaeontological Museum,University of Oslo, No. 403, 117 pp.BUATOIS, L. A., M. G. MçNGANO, R.MIKULç, AND MAPLES, C. G. 1998. Theichnogenus Curvolithus revisited. Journal ofPaleontology, 72 (4): 758-769. ÊCARRERA, M. G. 1997. Evoluci�n yrecambio de la fauna de por�feros y Briozoosen el Ordov�cico de la PrecordilleraArgentina. Ameghiniana, 34 (3): 295-308.CARRERA, M. G. 1997. An�lisis paleo-ecol�gico de la fauna de por�feros delLlanvirniano tard�o de la PrecordilleraArgentina. Ameghiniana, 34 (3): 309-316.CARRERA, M. G. 1998. First Ordoviciansponge from the Puna region, NorthwesternArgentina. Ameghiniana, 35 (2): 393-412.CARRERA, M. G. AND F. L. CA�AS. 1997.Los biohermos de la Formaci�n San Juan(Ordov�cico temprano, PrecordilleraArgentina): paleoecolog�a y comparaciones.Rev. Asoc. Argentina de Sedimentolog�a, 3(2): 85-104CARRERA, M. G., AND R. A. ASTINI. 1998.Valoraci�n de las restricciones ambientalesdurante la transici�n Arenigiano-Llanvirniano, Ordov�cico de la PrecordilleraArgentina. Rev. Asoc. Geol�gica Argentina,53 (1): 41-56.CHOI, D. K. 1998. The Yongwol Group(Cambrian-Ordovician) redefined: a proposalfor the stratigraphic nomenclature of theChoson Group. Geoscience Journal, 2: 220-234.CHOI, D. K. 1998. An Early Ordoviciantrilobite faunule from the ChosonSupergroup, Maepo, Tanyang area, Korea.Geoscience Journal, 2: 235-242.

CHOI, D. K., AND D. J. LEE. 1998.Ordovician stratigraphy and paleontology ofthe Taebaegsan region, Korea. Guidebook forIGCP 410 Field Meeting to Korea, 8-11September 1998, Seoul, Korea, 63 p.CHOI, D. K., J. G. LEE, AND D. H. KIM.1997. Cambrian-Ordovician geology andstratigraphy of Yeongweol area, Korea.Paleontological Society of Korea, Spec. Publ.3: 119-143.COOPER, J. D. AND W. B. LEATHAM.1999. Preliminary sequence stratigraphicframework for the Tippecanoe Sequence,Nopah Range, eastern California [abst].Geological Society of America Abstractswith Programs 31 (5).DALZIEL, I. W. D. AND R. A. ASTINI. 1998.Early Paleozoic paleogeography of laurentiaand western Gondwana: Evidence fromtectonic subsidence analysis: Comment andReply, Geology. 26 (6): 575-576.DE FREITAS, T. A., AND G. S. NOWLAN.1998. A new, major Silurian reef tract andoverview of regional Silurian reefdevelopment, Canadian Arctic and northGreenland. Bulletin of Canadian PetroleumGeology 46: 327-349.DOMAGALA, J., R. J. BULTITUDE, P. J. T.DONCHAK, B. G. FORDHAM, J. S. JELL,AND M. FANNING. 1998. Tectonic settingimplications from greywacke provenancedata from the Hodgkinson Province.Abstracts, Geological Society of Australia,49: 116.ELIAS, R. J. AND D.-J. LEE. 1993.Microborings and growth in late Ordovicianhalysitids and other corals. Journal ofPaleontology, 67: 922-934.FERRETTI, A. 1998. Upper Ordovicianconodonts from the Prague Basin (Bohemia).In:H. Szaniawski (ed.), Proceedings of theSixth European Conodont Symposium(ECOS VI), Palaeontologia Polonica: 121-137, 2 figs., 1 tab., 2 pls.FERRETTI, A. AND SERPAGLI E. 1998.Stratigraphic and biogeographic significance


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of Late Ordovician from Sardinia (Italy). In:G. Bagnoli (ed.), ECOS VII Abstracts,Bologna-Modena, 1998, Abstracts: 35-36.FERRETTI, A., E. SERPAGLI, S. BARCA,AND F. LEONE. 1998A. Late Ordovicianconodonts from Umbrarutta betweenDonigala and Lago Mulargia. In: E. Serpagli(ed.), Sardinia Guide-book, ECOS VII;Giorn. Geologia, 60, Spec. Issue: 202-208, 3figs., 2 pls., Bologna.FERRETTI, A., E. SERPAGLI, W.HAMMANN, AND F. LEONE. 1998B.Conodonts and biofacies from the LateOrdovician of Cannamenda (Bacu Abis). In:E. Serpagli (ed.), Sardinia Guide-book, ECOSVII; Giorn. Geologia, 60, Spec. Issue: 178-187, 2 figs., 3 pls., Bologna.FERRETTI A., E. SERPAGLI, F. LEONE,AND A. LOI. 1998C. The late Ordoviciansection Cea Brabetza near San Basilio. In: E.Serpagli (ed.), Sardinia Guide-book, ECOSVII; Giorn. Geologia, 60, Spec. Issue: 96-101, 3 figs., 1 pl., Bologna.FINNEY, S. C., AND W. B. N. BERRY. 1998.An actualistic model of graptolite bio-geography, p. 183 185. In: J.C. Guti�rrez-Marco. and I. Rabano (eds.), Proceedings ofthe Sixth International Graptolite Conferenceof the GWG (IPA). Instituto TecnologicoGeominero de Espana, Temas Geologico-Mineros, 23, Madrid.FINNEY, S. C., W. B. N. BERRY, J. D.COOPER, R. L. RIPPERDAN, W. C.SWEET, S. R. JACOBSON, A. SOUFIANE,A. ACHAB, AND P. J. NOBLE. 1999. LateOrdovician mass extinction: A newperspective from stratigraphic sections incentral Nevada. Geology, 27 (3): 215-218.GABBOTT, S. E. 1998. Taphonomy of theOrdovician Soom Shale Lagerstatte: anexample of soft tissue preservation in clayminerals. Palaeontology, 41, 631-667.GABBOTT, S. E., R. J. ALDRIDGE, AND J.N. THERON. 1998. Chitinozoan chains andcocoons from the Upper Ordovician SoomShale lagerstatte, South Africa; implications

for affinity. Journal of the GeologicalSociety, 155: 447-452.GONCUOGLU, C., AND H. KOZUR. 1998.Remarks to the pre-Variscan development inTurkey.In: Linnemann, U., Heuse, T., Fatka,O., Kraft, P., Brocke, R. and Erdtmann, B.-D. (eds.); Pre-Variscan terrane analysis ofÒGondwanan EuropeÓ. Schr. Staatl. Mus.Min. Geol. Dresden, 99: 137-138, Dresden.GRANT, S. F., A. L. COE, AND H. A.ARMSTRONG. 1999. Sequence stratigraphyof the Coniacian of the Anglo-Paris Basin.Geological Magazine 136: 17-38.HEIN, F. J., AND G. S. NOWLAN. 1998.Regional sedimentology, conodont bio-stratigraphy and correlation of MiddleCambrian - Lower Ordovician (?) strata ofthe "Finnegan" and Deadwood formations,Alberta subsurface, Western CanadaSedimentary Basin. Bulletin of CanadianPetroleum Geology 46: 166-188.HEREDIA, S. 1998. Eoplacognathusrobustus (Conodonta) en la Formaci�nPon�n Trehu� (Ordov�cico inferior), SierraPintada, Provincia de Mndoza, Argentina.Ameghiniana, 35 (3): 337-344.HINTS, O. 1998. Revision of the Ordovicianand Silurian ramphoprionid polychaetesfrom Severnaya Zemlya, Russian Arctic.Proceedings of the Estonian Academy ofSciences. Geology, 47: 77-85.HINTS, O. 1998. Late Viruan (Ordovician)polychaete jaws from North Estonia and theSt. Petersburg region. Acta PalaeontologicaPolonica, 43: 471-516.HINTS, L. 1998. Oandu Stage (Caradoc) incentral North Estonia. Proceedings of theEstonian Academy of Sciences. Geology. 47(3): 158-172.HOLMDEN, C. H., R. A. CREASER, K.MUEHLENBACHS, S. A. LESLIE, AND S .M. BERGSTR�M. 1998. Isotopic evidencefor geochemical decoupling between ancientepeiric seas and bordering oceans:Implications for secular curves. Geology, 26(6): 567-570.


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HOLMDEN, C, PAN, Y, LESLIE, S. A., ANDS. M. BEGRSTR�M. 1998. Rare earthelement geochemistry of the 454 MaMohawkian sea. Geological Society ofAmerica, Abstracts with Programs, 30 (7):A-373.HUFF, W. D., S. M. BERGSTR�M, D. R.KOLATA, C. CINGOLANI, AND R. A.ASTINI. 1998. Ordovician K-bentonites inthe Argentine Precordillera: relations togondwana margin evolution. In: R.J.Pankhurst and C.W. Rapela (eds.), TheProto Andean margin of Gondwana.Geological Society of London SpecialPublication, 142: 107-126.KALJO, D., L. HINTS, T. MARTMA, AND J.NÍLVAK. 1998. Refinements of carbonisotope stratigraphy in the latest Ordovicianof Estonia. Mineralogical Magazine, 62A:740-741.KALJO, D., T. KIIPLI, AND T. MARTMA.1998. Correlation of carbon isotope eventsand environmental cyclicity in the EastBaltic Silurian. In: E. Landing, and M.E.Johnson (eds.), Silurian cycles - linkages ofdynamic stratigraphy with atmospheric,oceanic and tectonic changes. New YorkState Museum Bulletin, 491: 297-312.KELLER, M., W. BUGGISCH, AND O.LEHNERT. 1998. The Stratigraphic Recordof the Argentine Precordillera and its Plate-Tectonic Background. In: Pankhurst, R. J.,and C. W. Rapela, (eds.). The Proto-AndeanMargin of Gondwana. Geological Society ofLondon, Spec. Publ., 142: 35-56.KELLER, M., AND O. LEHNERT. 1998. TheSassito sedimentary succession: A pinpointin the geodynamic evolution of the ArgentinePrecordillera. Geologische Rundschau 87 (3):326-344.KIM, D. H. AND D. K. CHOI. 1997.Tremadoc trilobites from the MungogFormation, Yeongweol, Korea. Proceedingsof 30th International Geological Congress,11: 75-84.

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Neoproterozoic of eastern North Greenlandin relation to extensional tectonics on theLaurentian margin. Journ. Geological Society156: 113-124.STïRCH, P., J. C. GUTI�RREZ-MARCO, G.N. SARMIENTO, AND I. RçBANO. 1998.Upper Ordovician and Lower Silurian of theCorral de Calatrava, southern part of theCentral Iberian Zone. Temas Geol�gico-Mineros ITGE, 23: 319-325.STOUGE, S. AND G. BAGNOLI. 1998.Comments on some Lower Ordovicianmultielement conodont genera: implicationsfor conodont suprageneric taxonomy. In: G.Bagnoli (Editor), ECOS VII Abstracts: 108.Bologna-Modena.STRICKLAND, J. M., S. M. REGENFUSS, J.D. COOPER, AND W. D. LEATHAM. 1998.Paleokarst breccias in the Middle OrdovicianEureka Quartzite: Timing and Sequencestratigraphic implications [abst]. GeologicalSociety of America Abstracts with Programs30 (5).SZANIAWSKI, H. 1998. Ancestors ofconodonts. In: G. Bagnoli (ed.), SeventhInternational Conodont Symposium held inEurope, Abstracts: 111-112. Bologna -Modena.SZANIAWSKI, H. AND S. BENGTSON. 1998.Late Cambrian euconodonts from Sweden.In: H. Szaniawski (ed.), Proceedings of theSixth European Conodont Symposium.Palaeontologia Polonica, 58: 7-29.TAYLOR, P. D., AND M. A. WILSON. 1999.Dianulites: an unusual Ordovician bryozoanwith a high-magnesium calcite skeleton.Journal of Paleontology, 73 (1): 38-48.TINN, O. 1998. The OrdovicianClitambonitidine brachiopod genus Vellamoin Estonia. Proc. Estonian Acad. Sci. Geol.,47, 3: 195-216TONGIORGI, M., YIN L. M., AND S .STOUGE. 1998. Acritarch and conodontbiofacies reveal sea level changes on theYangtze Platform during Arenig times(Dawan Formation, south China). CIMP


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NAMES AND ADDRESS CHANGES

Galina P. ABAIMOVADept. of Stratigraphy and PaleontologySNIIGGandMS, Krasnyi Prospect 67Novosibirsk 91RUSSIA 630091Tel.: (3832) 540117Fax: (3832) 22-57-40E-mail: [email protected]

F. Gilberto ACE�OLAZAINSUGEO - CONICETUniversidad Nacional de Tucum�nMiguel Lillo 2054000 San Miguel de Tucum�nARGENTINAE-mail: 1) [email protected]) [email protected]

Guillermo F. ACE�OLAZAInstituto de Geolog�a Econ�mica(CSIC-UCM)Facultad de Ciencias Geol�gicas28040 MadridSPAINTel.: 34-91-5445459Fax: 34-91-3944849E-mail: [email protected]

Leho AINSAARInstitute of Geology, University of TartuVanemuise 46, Tartu 51014ESTONIATel.: +3727 375 834Fax: +3727 375 836E-mail: [email protected]

Guillermo L. ALBANESICentre for Earth and Ocean ResearchUniversity of Victoria, P.O. Box 3055Victoria, B.C., V8W 3P6CANADATel.: (250) 721-8848Fax: (250) 472-4100E-mail: 1) [email protected] (Canada)

2) [email protected] (Argentina)3) [email protected] (Argentina)

Richard J. ALDRIDGEDepartment of GeologyThe UniversityLeicester LE1 7RHU.K.Tel.: 0116 252 3610Fax: 0116 252 3918E-mail: [email protected]

Howard A. ARMSTRONGDept of geological SciencesUniversity of Durham,South Road, Durham, DH1 3LEU.K.Tel.: 0191 3744780Fax: 0191 3742510E-mail: [email protected]

Ricardo A. ASTINIEstratigraf�a y Geolog�a Hist�ricaUniversidad Nacional de C�rdobaAv. Velez Sarsfield 299, C.C. 3955000 C�rdobaARGENTINATel.: (54) 3543-433238Fax: (54) 351-4332097E-mail: [email protected]

Gabriella BAGNOLIDipartimento di Scienze della TerraVia S. Maria, 5356126 PisaITALYTel.: +39-050-847239Fax: +39-050-500932E-mail: [email protected]

Christopher R. BARNESSchool for Earth and Ocean Sciences andCentre for Earth and Ocean ResearchUniversity of Victoria, P. O. Box 3055


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Victoria, B.C., V8W 3P6CANADATel.: (250) 721-6120Fax: (250) 721-6200E-mail: [email protected]

Stephanie BARRETTGeology DepartmentBennett Building, University of LeicesterLeicester LE1 7RHGREAT BRITAINTel.: 011 6 2523315/2523644/2525060E-mail: [email protected]

Fred H. BEHNKENFHB Stratigraphic ServicesP. O. Box 7648Midland, TX 79708-7648U.S.A.Tel.: (915) 684-3776Fax: (915) 684-3776E-mail: [email protected]

Juan L. BENEDETTOCatedra de Estratigrafia y Geologia HistoricaUniversidad Nacional de C�rdobaAv. Velez Sarsfield 299.5000 C�rdobaARGENTINAE-mail: [email protected]

Matilde S. BERESIAlem 539, 2 B5500 MendozaARGENTINATel.:54-261-4237922Fax: 54-261-4285940E-mail: [email protected]

Edsel D. BRUSSAInstituto GeonorteFacultad de Ciencias NaturalesUniversidad Nacional de SaltaBuenos Aires 1774400 SaltaARGENTINA

E-mail: [email protected]

David L. BRUTONPaleontologisk MuseumSars Gate 10562 OsloNORWAYTel.: (47) 22 85 16 68Fax.: (47) 22 85 18 10E-mail: d.l. [email protected]

Luis A. BUATOISINSUGEO - Facultad de Ciencias NaturalesUniversidad Nacional de Tucum�nCasilla de correo 14000 San Miguel de Tucum�nARGENTINATel.-Fax: 54-81-236395E-mail: [email protected]

Marcelo G. CARRERAC�tedra de Estratigraf�a y Geolog�a Hist�ricaUniversidad Nacional deC�rdobaAv. V�lez Sarsfield 2995000 C�rdobaARGENTINATe: 54-051-332098Fax: 54-051- 332097E-mail: [email protected]

Carlos CINGOLANIDepartamento Cient�fico de Geolog�aMuseo de La Plata, Paseo del Bosque s/n1900 La PlataARGENTINAE-mail: [email protected]

Duck K. CHOIDepartment of Geological SciencesCollege of Natural SciencesSeoul National UniversitySeoul 151-742,REPUBLIC OF KOREATel.: +82-2-880-6737Fax: +82-2-876-9798E-mail: [email protected]


53

John C. W. COPEDepartment of Earth SciencesCardiff UniversityP.O. Box 914Cardiff CF1 3YEU.K.Tel: 44 (0) 1222 874327Fax: 44 (0) 1222 874326E-mail: [email protected]

Alfredo J. CUERDADepartamento Cient�fico de Geolog�aMuseo de La Plata, Paseo del Bosque s/n1900 La PlataARGENTINAE-mail: [email protected]

Susana B. ESTEBANINSUGEO - CONICETUniversidad Nacional de Tucum�nMiguel Lillo 2054000 San Miguel de Tucum�nARGENTINAE-mail: [email protected]

R. L. ETHINGTONDepartment of Geological SciencesUniversity of Missouri-ColumbiaColumbia, Missouri 65211U.S.A.Tel.: 573-882-6470Fax: 573-882-5458E-mail: [email protected]

Annalisa FERRETTIDipartimento di Scienzedella Terra- PaleontologiaVia Universit� 441100 ModenaITALYTel.: ++39-059-217084Fax: ++39-059-218212E-mail: [email protected]

Stanley C. FINNEYDepartment of Geological SciencesCalifornia State University - Long BeachLong Beach, CA 90840U.S.A.Tel.: (562) 985-8637Fax: (562) 985-8638E.mail: [email protected]

Barry G. FORDHAMGeological Survey of QueenslandG. P. O. Box 194Brisbane, Qld. 4001AUSTRALIATel.: +61 7 3237 1418Fax: +61 7 3235 4074E-mail: [email protected]

Yakut GONCUOGLUMTA, Dept. of Geological Research(MTA Jeoloji Etudleri Dairesi)06520 AnkaraTURKEYE-mail: c/o [email protected]

Juan Carlos GUTI�RREZ-MARCOUEI Paleontolog�aInstituto de Geolog�a Econ�mica (CSIC-UCM)Facultad de Ciencias Geol�gicasE-28040 MadridSPAINE-mail: [email protected]

Susana HEREDIAMuseo de Geolog�a y Paleontolog�aUniversidad Nacional delComahueBuenos Aires 14008300 Neuqu�nARGENTINATel./Fax: 54-0299 - 4490-393E-mail: 1) [email protected]) [email protected]


54

Linda HINTSInstitute of GeologyTallinn Technical UniversityEstonia Blvd 7Tallinn 10143ESTONIATel.: +372 6454649Fax: +372 6312074E-mail: [email protected]

Olle HINTSInstitute of GeologyTallinn Technical UniversityEstonia Ave. 710143 TallinnESTONIATel.: 372 6454649Fax: 372 6312074E-mail: [email protected]

Mario A. H�NICKENCRILAR Ð CONICETMendoza y Entre R�os5003, Anillaco, La RiojaARGENTINATel.: 54-3827-494251Fax: 54-3827-494231E-mail: [email protected]

David JOWETTSchool of Earth and Ocean SciencesUniversity of Victoria, P.O. Box 3055Victoria, B.C., V8W 3P6CANADATel.: (250) 380-4920E-mail: [email protected]

Dong-Jin LEEDept. of Earth and Environmental SciencesNational UniversityAndong 760-749, SeoulKOREATel.: +82 571 850-5471Fax: +82 571 841-1627E-mail: [email protected]

Dimitri KALJOInstitute of Geology atTallinn Technical University7 Estonia Boulv.10143 TallinnESTONIATel.: (372) 6454 653Fax: (372) 6312 074E-mail: [email protected]

Heinz KOZURR�zs� u. 83, H-1029BudapestHUNGARYTel./Fax: (+36) 1-397-1316

Jaroslav KRAFTZapadoceske muzeum PlzenGeol.-paleont. OddeleniKopeckeho sady 15301 35 PlzenCZECH REPUBLICTel. /Fax: +420 19 7237604

Petr KRAFTUniverzita KarlovaPrirodovedecka fakultaUstav geologie a paleontologieAlbertov 6128 43 Praha 2CZECH REPUBLICTel: +420 2 2195 2129Fax: +420 2 2195 2130E-mail: [email protected]

Jeffrey J. KUGLITSCH9139 West Barnard AvenueGreenfield, Wi 53228U.S.A.Tel.: 414-425-3825E-mail: [email protected]

W. Britt LEATHAMDept. Geological Sciences5500 University ParkwayCalifornia State University San Bernardino


55

San Bernardino, CA 92407U.S.A.Tel: 909.880.5322Fax: 909.880.7005E-mail: [email protected]

Oliver LEHNERTInstitut f�r Geologie und MineralogieUniversit�t ErlangenSchlossgarten 5D-91054 ErlangenGERMANYFax: +49-9131-859295E-mail: [email protected]

Stephen A. LESLIEDepartment of Earth ScienceUniversity of Arkansas at Little Rock2801 South UniversityLittle Rock, ArkansaS 72204-1099U.S.A.Tel.: (501) 569-8061Fax: (501) 569-3271E-mail: [email protected]

Jim LOCHEarth SciencesCentral Missouri StateWarrensburg, MO, 64093U.S.A.E-mail: [email protected]

Anita L�FGRENDept. of GeologyLund University SE-223 62 LundSWEDENTel.: +46-46-222 78 68Fax. +46-46-12 14 77E-mail: [email protected]

Peep M�NNIKInstitute of GeologyTallinn Technical UniversityEstonia Ave 7, 10143 TallinnESTONIA

Tel: +372 2 6 45 41 89Fax: +372 6 31 20 74E-mail: [email protected]

Mar�a G. MçNGANOINSUGEO - Facultad de Ciencias NaturalesUniversidad Nacional de Tucum�nCasilla de correo 14000 San Miguel de Tucum�nARGENTINATel.-Fax: 54-81-236395E-mail: [email protected]

Lee MCKENZIE-MCANALLYSchool of Earth and Ocean SciencesUniversity of Victoria, P. O. Box 3055Victoria, BC, V8W 3P6CANADATel.: (250) 721-6181Fax: (250) 721-6200E-mail: [email protected]

T�nu MEIDLAInstitute of GeologyUniversity of TartuVanemuise 46, 51014 TartuESTONIATel.: +372 7 375 839Fax: +372 7 375 836E-mail: [email protected]

Radek MIKULçInstitute of GeologyAcademy of Sciences of the Czech RepublicRozvojov 135, 16500 Praha 6CZECH REPUBLICTel.: +420-2-209 22 628Fax: +420-2-209 22 670E-mail: [email protected]ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊM. Cristina MOYAFacultad de Ciencias NaturalesUniversidad Nacional de Salta4400 SaltaARGENTINAE-mail: [email protected]


56

Suzanne MURRAYSchool of GeosciencesUniversity of WollongongWollongong, NSW 2522AUSTRALIATel.: +61 2 4221 3852Fax: +61 2 4221 4250E-mail: [email protected]

Paul MYROWDept. of GeologyColorado CollegeColorado Springs, CO 80903U.S.A.

Jaak NOLVAKInstitute of GeologyTallinn Technical UniversityEstonia Boulevard 710143 TallinnESTONIATel.: +372 6454 677Fax: +372 6312 074E-mail: [email protected]

Godfrey S. NOWLANGeological Survey of Canada3303 -33rd Street NWCalgary, Alberta, T2L 2A7CANADATel.: 403-292-7079Fax: 403-292-6014E-mail: [email protected]

Gladys ORTEGAMuseo de Paleontolog�aUniversidad Nacional de C�rdobaC. C. 15985000 C�rdobaARGENTINATel.: 54-351-4332098Fax: 54-351-4332097E-mail: [email protected]

E. Guillermo OTTONEDepartamento de Geolog�aFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresARGENTINAE-mail: [email protected]

Christian PALSSONDepartment of GeologyLund UniversitySolvegatan 13SE-223 62 LundSWEDENTel.: +46 46 222 82 65Fax: +46 46 12 14 77E-mail: [email protected]

Silvio H. PERALTAInstituto de Geolog�a (INGEO)Facultad Ciencias Exactas, F�sicas yNaturales, Universidad Nacional de San JuanAvda. Jos� Ignacio de la Roza y Meglioli5400 Rivadavia - San JuanARGENTINATel.-Fax: 54 - 64 - 265103E-mail: [email protected]

Ian G. PERCIVALGeological Survey of New South WalesP.O. Box 76, Lidcombe 2141NSW. Australia.Tel.: +61 2 9649 5266Fax: +61 2 9646 3224E-mail: 1) [email protected]) [email protected]

Leanne PYLESchool of Earth and Ocean SciencesUniversity of VictoriaP.O. Box 3055Victoria, BC, V8W 3P6CANADATel.: (250) 721-6181Fax: (250) 721-6200E-mail: [email protected]


57

Raquel I. RAOMuseo de Paleontolog�aUniversidad Nacional de C�rdobaAv. V�lez Sarsfield 2995000 C�rdobaARGENTINATe: 54-351-4332098Fax: 54-351-4332097

Jia-yu RONGNanjing Institute of Geologyand PalaeontologyAcademia SinicaChi-Ming-SsuNanjing 210008CHINA

Arvo RÍÍMUSOKSInstitute of Geology, University of TartuVanemuise, 4651014 TartuESTONIATel.: +372 7 375 839Fax: +372 7 375 836

Claudia V. RUBINSTEINIANIGLA - CRICYTC. C. 1315500 MendozaARGENTINATel: 54-261-4287029/4274011Fax: 54-261-4285940E-mail: [email protected]

Mar�a Jos� SALASC�tedra de Estratigraf�a y Geolog�a Hist�ricaUniversidad Nacional de C�rdobaAv. V�lez Sarsfield 2995000 C�rdobaARGENTINATe: 54-351-4332098Fax: 54-351-4332097E-mail: [email protected]

Teresa M. SçNCHEZCatedra de Estratigrafia y Geologia HistoricaUniversidad Nacional de C�rdobaAv. Velez Sarsfield 2995000 C�rdobaARGENTINAE-mail: [email protected]

Ivan J. SANSOMSchool of Earth SciencesUniversity of BirminghamBirmingham B15 2TTU.K.Tel.: +44 (0)121 414 6147Fax: +44 (0)121414 4942E-mail: [email protected]

Graciela N. SARMIENTODpto. de Paleontolog�aFacultad de Ciencias Geol�gicasUniversidad Complutense de Madrid28040 MadridSPAINTel.: 91-3944853Fax: 91-3944849E-mail: [email protected]

Enrico SERPAGLIDipartimento di Scienzedella Terra-PaleontologiaVia Universit� 441100 ModenaITALYTel.: ++39-059-217084Fax: ++39-059-218212E-mail: [email protected]

M. Paul SMITHSchool of Earth SciencesUniversity of BirminghamEdgbaston, Birmingham, B15 2TTU.K.Tel.: (+44) 121 414 4173Fax: (+44) 121 414 4942E-mail: [email protected]


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Svend STOUGEGeological Survey of Denmark & GreenlandThoravej 8Copenhagen NV, DK-2400DENMARKPhone: +45 3814 2717 (direct)Fax: +45 3814 2050E-mail: [email protected]

Oleg V. SYCHEVDivision of Stratigraphy and PaleontologySNIIGG&MS, Krasny Prospect, 67Novosibirsk, 630091RUSSIATel.: 224 473Fax: 214 947E-mail: [email protected]

Hubert SZANIAWSKIInstytut Paleobiologii PAN im. R.Kozlowskiego, ul. Twarda 51/5500-818 WarszawaPOLANDTel.: 6206224Fax: 6206225E-mail: [email protected]

Carol TANGDept. of GeologyArizona State UniversityTempe, AZ 85287U.S.A.E-mail: [email protected]

Sergey S. TERENTIEVMining InstituteDept. of Historical and Dynamic Geology21 liniya, 2199026 St. PetersburgRUSSIA

Oive TINNInstitute of GeologyUniversity of TartuVanemuise 46, EE 51014ESTONIA

Tatjiana Yu. TOLMACHEVAVSEGEI, Srednii pr. 74199026 St. PetersburgRUSSIAE-mail: [email protected]

Blanca A. TORODepartamento de Geolog�a y Paleontolog�aIANIGLA, CRICYT. Av. Adrian Ru�zLeal S/N. Parque General San Mart�n5500 MendozaARGENTINATel.: 54-061- 287029/ 274011Fax: 54-061- 287029E-mail: [email protected]

M. Franco TORTELLODepartamento Paleontologia InvertebradosMuseo de Ciencias NaturalesPaseo del Bosque s-n1900 La PlataARGENTINA.E-mail: [email protected]

Simon TULLPGS Reservoir (UK) Ltd17 Marlow RoadU.K.Tel.: +(0)1628-641058Fax: +(0)1628-641200E-mail: [email protected]

Fons VANDENBERGGeological Survey of VictoriaP.O. Box 500East Melbourne, Vic. 3002AUSTRALIAE.mail: [email protected]

Jean VANNIERUniversit� Claude Bernard Lyon 1Centre des Sciences de la TerreUMR 5565 du CNRS43, bd du 11 novembre 191869622 Villeurbanne CedexFRANCE


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Tel.: +33 (0)4 72448000 extension 3829Fax: +33 (0)4 72448436E-mail: [email protected]

Viive VIIRAInstitute of GeologyEstonia Ave 710143 TallinnESTONIATel.: 372 6454189Fax: 372 6 312074E-mail: [email protected]

Enrique VILLASDpto. Ciencias de la Tierra (Paleontologia)Facultad de CienciasUniversidad de Zaragozac/ Pedro Cerbuna s.n.50009 ZaragozaSPAINTel.: 34. 976.76.10.78Fax: 34. 976.76.10.88E-mail: [email protected]

Beatriz G. WAISFELDMuseo Argentino de Ciencias Naturales"Bernardino Rivadavia"Divisi�n Paleozoolog�a de InvertebradosAv. Angel Gallardo 4701405 Buenos AiresARGENTINAFax: 54 1 982 4494E-mail: [email protected]

Barry D. WEBBYCentre for Ecostratigraphy & PaleobiologyDepartment of Earth and Planetary SciencesMacquarie UniversityNorth Ryde, N.S.W., 2109AUSTRALIATel.: (02) 9816 4020Fax: (02) 9850 6904E-mail: [email protected]

S. Henry WILLIAMSGeological Survey of Canada3303 - 33rd Street NWCalgary, Alberta, T2L 2A7CANADATel.: (403) 292-7018Fax: (403) 292-5377E-mail: 1) [email protected]) [email protected](Newfounland)

Mark A. WILSONDepartment of GeologyThe College of WoosterWooster, OH 44691U.S.A.Tel.: 330-263-2247FAX: 330-263-2249E-mail: [email protected]

Anastasiya G. YADRENKINADiv. Stratigraphy and PaleontologySNIIGG&MS, Krasny Prospect, 67Novosibirsk, 630091RUSSIATel.: 224 473Fax: 214 947E-mail: [email protected]

Michael ZUYKOVSt. Petersburg State UniversityDept. of Paleontology16 liniya, 29199178 St. PetersburgRUSSIAFax: +7(812) 346-11-29E-mail: [email protected]


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