OLR (1985) 32 (9) D. Submarine Geology and Geophysics 749

Dryas,' which lasted from ~11 to 10 kyBP. If correct, the initiation of deglaciation occurred after 14 kyBP, which disagrees with most other deep-sea timescales. Scripps Inst. of Oceanogr., La Jolla, CA 92093, USA.

05:5102 Borns, H.W. Jr., Pierre LaSaUe and W.B. Thompson

(eds.), 1985. Late Pleistocene history of north- eastern New England and adjacent Quebec [Canada]. Spec. Pap. geol. Soc. Am~ 197:159pp; 14 papers. Inst. for Quat. Stud., Univ. of Maine, Orono, ME 04469, USA.

85:5103 Hickman, C.S. and J.H. Lipps, 1985. Geologic youth

of Galtipagos Islands confirmed by marine stra- tigraphy and paleontology. Science, 227(4694): 1578-1580.

Careful examination of the 6 types of fossiliferous marine deposits on the islands indicates that fossil remains previously thought to be Miocene or younger are all less than 2 million years old, thus substantiating radiometric datings and other geo- logic evidence for the islands' emergence in the Pliocene; their unique terrestrial biota apparently evolved within the last 3-4 million years. Dept. of Paleontol., Univ. of Calif., Berkeley, CA 94720, USA. (hbf)

85:5104 Hoffman, Antoni and Joe Ghiold, 1985. Randomness

in the pattern of 'mass extinctions' and 'waves of origination.' Geol. Mag., 122(1):1-4.

Empirical patterns in extinction and origination of marme and nonmarine families in the Phanerozoic are tested against randonmess as a null hypothesis, formulated as a simple neutral model. Data derived from Sepkoski's (1982) compendium do not con- tradict the hypothesis that observed periodicities of mass extinctions originated from random processes. 'Fossil-Lagerstatten' introduces bias which causes a 'discrepancy between the model and the empirical pattern.' Lamont-Doherty Geol. Observ., Palisades, NY 10964, USA. (mjj)

85:5105 Huang, Qingfu and Shuxi Cang, 1985. The Late

Quaternary paleoenvlroumental history of Bohal: fauna assemblages. Mar. Geol. Quat. Geol., 5(1):27-38. (In Chinese, English abstract.) Inst. of Oceanol., Acad. Sin., People's Republic of China.

85:5106 Kadko, David, 1985. Late Cenozoic sedimentation

and metal deposition in the North Pacific. Geochim. cosmochim. Acta, 49(3):651-661.

The major features of sediment chemistry of cores from the North Pacific apparently vary in a fairly uniform and systematic manner, consistent with Cenozoic plate movement. Elements with a signif- icant authigenic component (e.g., Mn, Co, Cu, Ni) display high concentrations at depth in cores that correspond to the period when the seafloor accu- mulated sediment at an extremely slow rate (~1 mm/kyr). These concentrations were diluted when the sites experienced an increase in the eolian mass accumulation rate first brought about by migration into the influence of the westerlies and then, dominantly, by the huge input of wind-blown detritus which corresponded to the onset of North- ern Hemisphere glaciation. Coll. of Oceanogr., Oregon State Univ., Corvallis, OR 97331, USA.

85:5107 Labracherie, Monique, Josette Duprat and Laurent

Labeyrie, 1984. Blestratigraphic and sedimento- logic data in different regions between 35 ° and 66°S on a transect from South Africa to Weddell Sea. Preliminary results of the MD31/APSARA I cruise aboard the N.O. Marion Dufiesne. Bull. Inst. G~ol. Bassin Aquitaine, 36:21-36. (In French, English abstract.)

Biostratigraphic and lithologic analyses revealed non-deposit or erosive periods attributed to an intense deep-sea circulation which led to outcrop- ping of Pleistocene sediments dating back to 700,000 years. Evidence of these sediments exists on higher locations within the Polar Front Zone and along the America-Antarctic ridge. Results suggested that changes in the calcite compensation depth and the pelagic sediment pattern throughout the Plio- Pleistocene are due to changes in the circumpolar Antarctic circulation. Inst. de Geol. du Bassin d'Aquitaine, Unite assoc, au CNRS n. 197, 351 tours de la Liberation, 33405 Talence Cedex, France.

05:5108 Ledbetter, M.T. and W.L. Balsam, 1985. Paleocean-

ography of the Deep Western Boundary Under- current on the North American continental margin for the past 25,000 yr. Geology, geol. Soc. Am., 13(3):181-184.

Fluctuations in position and velocity of the Deep Western Boundary Undercurrent (DWBUC) were deduced from silt mean particle size and percent Uvigerina (indicator of low-oxygen bottom water);

750 D. Submarine Geology and Geophysics OLR (1985) 32 (9)

carbonate dissolution was inferred from foraminif- eral indices. No evidence was found for 'total stagnation of the western North Atlantic during glacial time.' The DWBUC remained vigorous during the last 25,000 yr despite fluctuations in its depth, velocity and perhaps its chemistry. Moss Landing Mar. Lab., P.O. Box 450, Moss Landing, CA 95039, USA. (mjj)

85:5109 Ross, C.A. and J.R.P. Ross, 1985. Late Paleozoic

depositional sequences are synchronous and worldwide. Geology, geol. Soc. Am., 13(3):194- 197. Gulf Oil Explor. and Prod. Co., P.O. Box 36506, Houston, TX 77236, USA.

85:5110 Szabo, B.J., 1985. Uraniunv-serles dating of fossil

corals from marine sediments of southeastern United States Atlantic coastal plain. Geol. Soc. Am. Bull., 96(3):398-406.

Uranium-thorium measurements were used to date 55 fossiliferous coral samples obtained from several different Pleistocene deposits. 'Concordant and apparently reliable dates,' ranging from 71,000 yr to 460,000 yr were obtained for most of the samples. These ages were correlated with oxygen isotope substages. Qualitative trends in uranium series dates agreed with trends in amino acid data for all but 2 groups of samples. USGS, Box 25046, Denver, CO 80225, USA. (mjj)

85:5111 Vilks, G., D. Buckley and L. Keigwin, 1985. Late

Quaternary sedimentation on the southern Solun Abyssal Plain. Sedimentology, 32(1):69-82.

Lithologic, paleontological, mineralogical, geochem- ical, and geochronological studies of 6 cores col- lected below the CCD from a flat, 10-km square area show that the top 2 m of Holocene fine-silty muds derived from local promontories overlie 6 m of Late Wisconsinian clay from northern sources, which rest in turn on sandy sediments containing probable latest Wisconsinian benthic Foraminifera from the Scotian Shelf. Atlantic Geosci. Center, Bedford Inst. of Oceanogr., P.O. Box 1006, Dartmouth, NS B2Y 4A2, Canada. (hbf)

85:5112 Wang, Pinxian and Qiubao Min, 1985. Quaternary

marine transgressions in China: some basic questions. Mar. Geol. Quat. Geol., 5(1): 15-25. (In Chinese, English abstract.)

Between 1922 and 1983 at least 135 papers were published which dealt with Quaternary marine

transgressions in East China. Basic questions dealing with current practices in recognizing marine trans- gressions, their number (at least 5 in the last 2.4 million years), correlation and nomenclature are reviewed and discussed. Tongji Univ., Shanghai, People's Republic of China. (hbf)

85:5113 Xu, Dao-Yi et al., 1985. Abundance variation of

iridium and trace elements at the Permian/Tri- assic boundary at SImngsi in China. Nature, Lurid., 314(6007):154-156. Inst. of Geol., State Seismological Bur., Beijing, China.

DIS0. P a l e o n t o l o g y (see also E-BIOLOGICAL OCEANOGRAPHY)

85:5114 Granlund, A.H. and J.O.R. Hermelin, 1983.

MIAS--a microcomputer-based image analysis system for micropaieontology. Stock& Contr. Geol., 39(4):127-137. Univ. of Stockholm, Dept. of Geol., S-106 91, Stockholm, Sweden.

85:5115 Hattori, Isamu, 1985. Prolmbilistic aspects of micro-

paleontologic assemblage zones. Mathl Geol., 17(2):167-175.

Some planktonic radiolarian, conodont and diatom species are used as index fossils to characterize micropaleontologic assemblage zones. The number of such assemblage-defining species (A) may be expressed as a ratio of the total number of species (N) in the zone. A probabilistic model relates the size of the ratio A:N to the duration of the assemblage. Problems arising from natural sorting and artificial biases are discussed. Geol. Lab., Fnkui Univ., 910 Fukui, Japan. (mjj)

85:5116 Kouyoumontzakis, Georges, 1984. Amphisteginidae

(Foraminifera) of tim Congolese eonttuental shelf [E. equatorial Athmticl. Revue Micropal~ont., 27(3):196-208. (In French, English abstract.) Lab. de Stratigraph. et Paleoecol., Univ. de Provence, F 13331 Marseille Cedex 03, France.

85:5117 Lin, Meihua, 1985. History of the research of

calcareous namlofo~lis [in China]. Mar. Geol. Quat. Geol., 5(1):109-114. (In Chinese, English abstract.) Inst. of Oceanology, Acad. Sin., People's Republic of China.