BEDROCK GEOLOGIC MAP OF VERMONT › PubDocs › DEC › GEO › VTBedrockMap › SIM31… ·...
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QUEBEC, CANADA MASSACHUSETTS NEW YORK HAMPSHIRE NEW QUEBEC, CANADA MASSACHUSETTS NEW YORK HAMPSHIRE NEW ´ ´ 45° 73° 22’ 30” 72° 30’ 71° 30’ 71° 30’ 72° 72° 73° 44° 30’ 45° 44° 30’ 44° 44° 43° 30’ 43° 30’ 43° 43° 42° 37’ 30” 42° 37’ 30” 73° 30’ 73° 30’ 73° 22’ 30” 72° 30’ 73° 10 0 10 20 30 40 KILOMETERS SCALE 1: 700 000 10 0 10 20 30 MILES 45° 72° 73° 44° 30’ 44° 43° 30’ 43° 30 MILES 0 10 20 30 40 KILOMETERS 0 10 20 M10 D4, M10 M10, S3, S4 D9 D2, D9 D9 D2, D9, S1 D9, R28 C3, D9 D9 D9 D9 D9 D9, R28 C3, D6, D9 C3, D9, R29, S13, S14 D4, D9, G6, H4, H5 D9, G6, H4 D4, D9, H4, H5 D4 D4 D4, G9, H5 D4, G9, H5 D4, E3, M10, M15 D4, M10, M15 D4, E3, M10, M15 D4, M10, M14, M15 M10, M13, M14, M15 D2, D9 D2, D9, M18, T3 B5, B6, C3, C8, D9, G1, G2, G3, S2 B1, B2, B6, C3, C8, D9, G1, G2, H5, K1, S13, S14 B1, B2, D4, D9, H4, H5, K1 D4, D9, H4, H5, H15 D4, D9, H4, H5 D4, G9, H5 D4, G9, H5 D7, D9 M11, M16, W15 M11, M16, W15 M8, M11, M16, W15 D3, D4, M11, M16, T1 D3, S12, S16, T1, W1 H10, H11, K7, S12, W1 H4, H5, S12, W9 D4, H4, H5, S12, R19 D4, H4, H5, S12 D4, H4, H5, S12, W17 H4, H5, M20, R4, S12, W17 S12, W16 G8, M11, M16, W15 G8, M11, M16, W15 F3, G8, M11, M16, W15 C10, D1, M11, M16, P3, S11, T1 D1, D4, L1, O1, S10, S12, T1 A3, M6, P4, S12, W8 H4, H5, S12 D4, H4, H5, S12 D4, H4, H5, S12 D4, H4, H5, R5, S12, W17 D4, L4, M19, R4, R5, T12, W17 C11, M4, M5, M6, S12 W15 W15 C1, D4 D4, W14 A3, W3, W14 A3, D4, K6 H5, H8 D4, H5 D4, H5 D4, H1, H5, M19, R4, R5 H1, L4, M19, R4, R5, T12 D4, H5 D4, M10, M15 D4, E3, M10, M15 D4, D11, M10, M12, M15 A1, C4, D10, D11, D12, M10, M15 D5, D9 D9, M18, T8 A2, B1, B2, C8, D9, G1, G2, K1, K4 B1, B2, C8, D9, G1, G2, H4, H5, K1 D4, D9, H4, H5 D4, D9, H4, H5 D4, D9, H4, H5 D4, W18 D4, W18 D4, M21, M22 D4, H5, M21, M22 D4, H5, M21, M22 D4, J1, R4 D4, M21, M22 D4, H5, L4, M21, M22 D4, H5, L4, M21, M22 D4, J1, L4, R4 D4, J1, R4 D4, J1, L4, R4 A2, D9, T9 D4, M10, M15 D4, E3, M10, M15 D4, D11, K5, M10, M15 C6, D11, M10, M15 D8, D9 D9, T8, T10 A2, D9, S8 D4, D9, H4, H5 D4, D9, H4, H5 D4, D9, H4, H5 D4, D9, H4, H5 D4, W18 D4, R4, W18 J1, L4, R4 A2, D9 M11, M16, W15 D4, H3, K3, M7, M11, M16, S15, W15 C6, C7, D4, K3, M11, M16 E1, M2, S12, T6, T7 E1, S7, S12, T6, T7, T8 C2, S12 D4, H4, H5, S12 D4, H4, H5, S12 D4, H2, H4, H5, S12 D4, H2, H4, H5, S12 E2, H7, R1, R2, R3, R4 L4, R4 B4, E2, R1, R2, R3, R4 C2, G5, S7, S12 M11, M16, W15 G4, G7, M9, M11, M16, S15, W15 D4, G7, M11, M16, S9, T11 A8, S12, T6, T7, W1 A8, S7, S12, T6, T7, W1 C2, K2, S12, W9 D4, H4, H5, S12 D4, H4, H5, S12 D4, H2, H4, H5, S12 D4, H2, H4, H5, M20, R3, R4, S12 B4, E2, R1, R2, R3, R4 B4, E2, R1, R2, R3, R4 L4, R4 C2, G5, S7, S12 D4, M10, M15 M10, M13, M15, S3, S4 D4, R27, Z4 R25 C9 H9 D4, Z4 B3, D4, L4, Z4 D4, S5 W15, Z1 M3, W15, Z1, Z2 V1, Z2 O2, R19, T13, V1 K6, W6, W7 H5, H6 D4, H5 L4, M19, R5 O2, R26 D4, H5 D4, H1, H5, M19, R5 H5, R19, W3 Z1 Z1, Z2 F2, Z2, Z3 F2, O2, R19, Z3 W12 O2, R14, R15 C5, D4, H5, T4, T5 W3 D4, H5, L2, L3, T4 D4, L2, L3 L4 F1, Z1 T2, R19, Z2 F2, Z2, Z3 B7, R8, R16 R8, W10, W11 D4, H5, T4, T5, W3 L2, L3, L4 R8, R19, W11 B7, F2, R19, Z3 L2, L3, T4, W2 T2, R19 S6 B10 R9, R17 L4, W4, W5 R6, R8, W13 R6, W13 S6 S6 R19 S6 R24 R10, R18 R12 S17 L4, W4, W5 L6, P1, S17 R19 H14, L6 R19 R20, R22 R20, R22 H14, L6 A6, L4 H12, L5, P1 L5 B9 R13 A4, R13 A4 R19, R23 A7, L4 D4, M1 B8 A5, H13 A5, D4, H13 R7, R11 R21 D4, P2, R19 L4 D4, M1 D4, M1, R19 R7, R11 L4 H13 R21 A5, H13 D4, P2, R19 R25 D4, L4, M21, M22 D4, L4, M21, M22 L4 L4 A6, A7, L4 A7, L4 F1 F1 P1 M17 P2, R19 P2, R19 ROUSES POINT OE N. EAST ALBURG OE N. HIGHGATE CENTER OE N. SHELDON SPRINGS OE N. SHELDON SPRINGS ENOSBURG FALLS OE N. ENOSBURG FALLS RICHFORD OE N. JAY PEAK OE N. NORTH TROY OE N. NEWPORT OE N. NEWPORT CENTER OE N. WEST CHARLESTON OE N. RICHFORD JAY PEAK NORTH TROY NEWPORT NEWPORT CENTER WEST CHARLESTON MORGAN CENTER OE N. NORTON POND OE N. MORGAN CENTER NORTON POND ROUSES POINT BEEKMAN- TOWN NORTH HERO ST. ALBANS BAY ST. ALBANS FAIRFIELD BAKERSFIELD HAZENS NOTCH LOWELL IRASBURG ORLEANS WESTMORE ISLAND POND SPECTACLE POND COLD HOLLOW MTS. WESTPORT VERGENNES WEST VERGENNES EAST BRISTOL MOUNT ELLEN WAITSFIELD BARRE WEST BARRE EAST KNOX MOUNTAIN GROTON WOODSVILLE NORTHFIELD PORT HENRY SNAKE MOUNTAIN MIDDLEBURY SOUTH MOUNTAIN LINCOLN WARREN BROOKFIELD WASHINGTON WEST TOPSHAM EAST CORINTH NEWBURY ROXBURY CROWN POINT BRIDPORT CORNWALL EAST MIDDLEBURY BREAD LOAF HANCOCK RANDOLPH CENTER CHELSEA VERSHIRE FAIRLEE PIERMONT RANDOLPH PLATTSBURGH SOUTH HERO GEORGIA PLAINS MILTON GILSON MOUNTAIN JEFFERSONVILLE EDEN ALBANY CRAFTSBURY CRYSTAL LAKE SUTTON WEST BURKE SENECA MOUNTAIN AVERILL OE N. AVERILL BLOOMFIELD MAIDSTONE LAKE MONADNOCK MOUNTAIN OE N. MONADNOCK MOUNTAIN TINKERVILLE STRATFORD STONE MOUNTAIN GROVETON JOHNSON KEESEVILLE COLCHESTER POINT COLCHESTER ESSEX CENTER UNDERHILL MOUNT MANSFIELD MORRISVILLE WOLCOTT CASPIAN LAKE STANNARD LYNDONVILLE BURKE MOUNTAIN GALLUP MILLS LANCASTER WHITEFACE MOUNTAIN JUNIPER ISLAND BURLINGTON ESSEX JUNCTION RICHMOND BOLTON MOUNTAIN MOUNT WORCESTER WOODBURY CABOT JOES POND ST. JOHNSBURY CONCORD LISBON MILES POND STOWE CHARLOTTE MOUNT PHILO HINESBURG HUNTINGTON WATERBURY MONTPELIER PLAINFIELD MARSHFIELD PEACHAM BARNET LOWER WATERFORD LITTLETON BETHLEHEM MIDDLESEX EAST ALBURG HIGHGATE CENTER BERLIN WILLIAMSTOWN ROWE HEATH BERNARDSTON NORTHFIELD COLRAIN TICONDEROGA ORWELL SUDBURY BRANDON ROCHESTER SOUTH ROYALTON SOUTH STRAFFORD SMARTS MOUNTAIN MOUNT CARMEL SHARON LYME BETHEL PUTNAM BENSON BOMOSEEN PROCTOR PICO PEAK CHITTENDEN WOODSTOCK NORTH DELECTABLE MOUNTAIN QUECHEE HANOVER CANAAN WHITEHALL THORN HILL POULTNEY RUTLAND PLYMOUTH WOODSTOCK SOUTH NORTH HARTLAND KILLINGTON PEAK WEST RUTLAND HARTLAND GRANVILLE WELLS WALLINGFORD CAVENDISH WINDSOR LUDLOW MOUNT HOLLY MIDDLETOWN SPRINGS PAWLET DANBY DORSET WESTON CHESTER ANDOVER WEST PAWLET SPRINGFIELD SALEM PERU MANCHESTER LONDONDERRY SAXTONS RIVER WINDHAM WEST RUPERT BELLOWS FALLS SHUSHAN ARLINGTON SUNDERLAND JAMAICA TOWNSHEND WESTMINSTER WEST STRATTON MOUNTAIN WALPOLE BENNINGTON WOODFORD NEWFANE PUTNEY MOUNT SNOW WEST DOVER HOOSICK FALLS SPOFFORD POWNAL STAMFORD READSBORO HINSDALE BRATTLEBORO JACKSONVILLE GOVERNORS MOUNTAIN NORTH POWNAL NORTH ADAMS PITTSBURG LOVERING MOUNTAIN CLAREMONT NORTH CLAREMONT SOUTH ALSTEAD GILSUM FORT ANN HARTFORD COSSAYUNA CAMBRIDGE EAGLE BRIDGE GRAFTON INDEX TO GEOLOGIC MAPPING BY 7.5-MINUTE QUADRANGLE [Alphanumeric designations under quadrangle names are keyed to Sources of Geologic Map Data at right. The “OE N” in the names of the northern tier of quadrangles along the border with Quebec stands for “overedge north”. Topographic maps are available at the USGS Store (http://store.usgs.gov).] INDEX TO COMPILATION RESPONSIBILITY BY 30 x 60-MINUTE QUADRANGLE (Contributors listed in alphabetical order) Aleinikoff, J.N., and Karabinos, Paul, 1990, Zircon U-Pb data for the Moretown and Barnard Volcanic Members of the Missisquoi Formation and a dike cutting the Standing Pond Volcanics, southeastern Vermont, chap. D of Slack, J.F., ed., Summary results of the Glens Falls CUSMAP Project, New York, Vermont, and New Hampshire: U.S. Geological Survey Bulletin 1887, p. D1–D10. (Also available at http://pubs.usgs.gov/bul/1887/.) Aleinikoff, J.N., Ratcliffe, N.M., and Walsh, G.J., 2011, Provisional zircon and monazite uranium-lead geochronology for selected rocks from Vermont: U.S. Geological Survey Open-File Report 2011–1309, 46 p., available only online at http://pubs.usgs.gov/of/2011/1309. Black, L.P., Kamo, S.L., Allen, C.M., Davis, D.W., Aleinikoff, J.N., Valley, J.W., Mundil, Roland, Campbell, I.H., Korsch, R.J., Williams, I.S., and Foudoulis, Chris, 2004, Improved 206 Pb/ 238 U microprobe geochronology by the monitoring of a trace-element-related matrix effect; SHRIMP, ID-TIMS, ELA-ICP-MS and oxygen isotope documentation for a series of zircon standards: Chemical Geology, v. 205, nos. 1–2, p. 115–140. Hueber, F.M., Bothner, W.A., Hatch, N.L., Jr., Finney, S.C., and Aleinikoff, J.N., 1990, Devonian plants from southern Québec and northern New Hampshire and the age of the Connecticut Valley trough: American Journal of Science, v. 290, no. 4, p. 360–395, doi:10.2475/ajs.290.4.360. Karabinos, Paul, and Aleinikoff, J.N., 1990, Evidence for a major Middle Proterozoic post-Grenvillian igneous event in western New England: American Journal of Science, v. 290, no. 8, p. 959–974, doi:10.2475/ajs.290.8.959. Karabinos, Paul, Samson, S.D., Hepburn, J.C., and Stoll, H.M., 1998, Taconian orogeny in the New England Appalachians; Collision between Laurentia and the Shelburne Falls arc: Geology, v. 26, no. 3, p. 215–218, doi:10.1130/0091–7613 (1998)026<0215:TOITNE>2.3.CO;2. Kohn, M.J., Orange, D.L., Spear, F.S., Rumble, Douglas, III, and Harrison, T.M., 1992, Pressure, temperature, and structural evolution of west-central New Hampshire; Hot thrusts over cold basement: Journal of Petrology, v. 33, no. 3, p. 521–556. Lyons, J.B., Aleinikoff, J.N., and Zartman, R.E., 1986, Uranium-thorium-lead ages of the Highlandcroft Plutonic Suite, northern New England: American Journal of Science, v. 286, no. 6, p. 489–509, doi:10.2475/ajs.286.6.489. Lyons, J.B., Bothner, W.A., Moench, R.H., and Thompson, J.B., Jr., 1997, Bedrock geologic map of New Hampshire: Reston, Va., U.S. Geological Survey, 2 sheets, scales 1:250,000 and 1:500,000. McWilliams, C.K., Walsh, G.J., and Wintsch, R.P., 2010, Silurian-Devonian age and tectonic setting of the Connecticut Valley-Gaspé trough in Vermont based on U-Pb SHRIMP analyses of detrital zircons: American Journal of Science, v. 310, no. 5, p. 325–363; doi: 10.2475/05.2010.01. Moench, R.H., and Aleinikoff, J.N., 2003, Stratigraphy, geochronology, and accretionary terrane settings of two Bronson Hill arc sequences, northern New England [part II]: Physics and Chemistry of the Earth, v. 28, nos. 1–3, p. 113–160, doi:10.1016/S1474-7065(03)00012-3. Moench, R.H., Boone, G.M., Bothner, W.A., Boudette, E.L., Hatch, N.L., Jr., Hussey, A.M., II, and Marvinney, R.G., 1995, Geologic map of the Sherbrooke-Lewiston area, Maine, New Hampshire, and Vermont, United States, and Québec, Canada, with Contributions to geochronology by J.N. Aleinikoff: U.S. Geological Survey Miscellaneous Investigations Series Map I–1898–D, 2 sheets, scale 1:250,000, includes pamphlet, 56 p. Rankin, D.W., and Tucker, R.D., 2000, Monroe fault truncated by Mesozoic (?) Connecticut Valley rift system at Bradford, VT; Relationship to the Piermont allochthon [abs.]: Geological Society of America Abstracts with Programs, v. 32, no. 1, p. A–67. Rankin, D.W., and Tucker, R.D., 2009, Bronson Hill and Connecticut Valley sequences in the Stone Mountain area, Northeast Kingdom, Vermont; Trip C–1, in New England Intercollegiate Geological Conference, 101st Annual Meeting, Lyndon State College, Lyndonville, VT, Sept. 25–27, 2009, Guidebook for field trips in the Northeast Kingdom of Vermont and adjacent regions: Northfield, Vt., Norwich University, p. C1–1 to C1–12. (Edited by D.S. Westerman and A.S. Lathrop.) Rankin, D.W., Coish, R.A., Tucker, R.D., Peng, Z.X., Wilson, S.A., and Rouff, A.A., 2007, Silurian extension in the Upper Connecticut Valley, United States and the origin of middle Paleozoic basins in the Québec embayment: American Journal of Science, v. 307, no. 1, p. 216–264, doi:10.2475/01.2007.07. Ratcliffe, N.M., Aleinikoff, J.N., Burton, W.C., and Karabinos, Paul, 1991, Trondhjemitic, 1.35–1.31 Ga gneisses of the Mount Holly Complex of Vermont; Evidence for an Elzevirian event in the Grenville basement of the United States Appalachians: Canadian Journal of Earth Sciences, v. 28, no. 1, p. 77–93, doi:10.1139/e91-007. Walsh, G.J., and Aleinikoff, J.N., 1999, U-Pb zircon age of metafelsite from the Pinney Hollow Formation; Implications for the development of the Vermont Appalachians: American Journal of Science, v. 299, no. 2, p. 157–170. SOURCES OF GEOLOGIC MAP DATA Agnew, P.C., 1977, Reinterpretation of the Hinesburg thrust in northwestern Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 82 p. Albee, A.L., 1957, Bedrock geology of the Hyde Park quadrangle, Vermont: U.S. Geo- logical Survey Geologic Quadrangle Map GQ–102, scale 1:62,500. Armstrong, T.R., 1993, Tectonic evolution of the Taconian hinterland, Granville- Hancock area, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 199 p. Armstrong, T.R., and Ratcliffe, N.M., 1998, Digital and preliminary bedrock geologic map of the Townshend 7.5 × 15 minute quadrangle, Vermont: U.S. Geological Sur- vey Open-File Report 98–335–A, 1 sheet, scale 1:24,000; 98–335–B, digital data- base for part A, 3 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG98–335A and 335B at http://www.anr.state.vt.us/ dec/geo/digitofr.htm.) Armstrong, T.R., 1994, Bedrock geology of the Moretown Formation, North River Ig- neous Suite and associated metasedimentary/metavolcanic rocks of the Connecticut Valley Belt, Brattleboro and Newfane [7.5 × 15 minute] quadrangles, Windham County, Vermont: U.S. Geological Survey Open-File Report 94–247, 26 p., 2 pls., scale 1:24,000. Armstrong, T.R., 1997, Preliminary bedrock geologic map of the Vermont part of the 7.5 × 15 minute Bellows Falls quadrangle, Windham and Windsor Counties, Ver- mont: U.S. Geological Survey Open-File Report 97–284, 1 sheet, scale 1:24,000, includes variously paged pamphlet. Armstrong, T.R., 2008, unpublished data. Aubrey, W.M., II, 1977, The structure and stratigraphy of the northern ridges of Camels Hump Mountain, Camels Hump quadrangle, north central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 57 p. Badger, R.L., 1977, Stratigraphy and origin of the Umbrella Hill Conglomerate: Burl- ington, Vt., University of Vermont, unpub. M.S.A. thesis, 106 p. Badger, R.L., 1979, Origin of the Umbrella Hill Conglomerate, north-central Vermont: American Journal of Science, v. 279, no. 6, p. 692–702, doi:10.2475/ajs. 279.6.692. Balk, Robert, 1956, Bedrock geology of the Massachusetts portion of the Northfield quadrangle, Massachusetts, New Hampshire, and Vermont: U.S. Geological Survey Geologic Quadrangle Map GQ–92, scale 1:31,680. Billings, M.P., 1937, Regional metamorphism of the Littleton-Moosilauke area, New Hampshire: Geological Society of America Bulletin, v. 48, no. 4, p. 463–566. Bothner, W.A., and Laird, Jo, 1987, Structure and metamorphism at Tillotson Peak, north-central Vermont, in New England Intercollegiate Geological Conference, 79th Annual Meeting, Montpelier, Vermont, 1987, Guidebook for field trips in Vermont, v. 2: Northfield, Vt., Norwich University, p. 383–395. (Edited by D.S. Westerman.) Bothner, W.A., and Laird, Jo, 1999, Geologic map of the Tillotson-Haystack area, Ha- zens Notch and parts of the Lowell 7.5 minute quadrangles, Vermont: Vermont Geo- logical Survey Open-File Report VG99–5, 2 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Brace, W.F., 1953, The geology of the Rutland area, Vermont: Vermont Geological Sur- vey Bulletin 6, 120 p., 3 pls., scale 1:31,680. (Also available at http://www.anr. state.vt.us/dec/geo/bulletins.htm.) Burton, W.C., 1991, Bedrock geologic map of the Woodford quadrangle, Bennington and Windham Counties, Vermont: U.S. Geological Survey Geologic Quadrangle Map GQ–1687, scale 1:24,000. Burton, W.C., 1993, Bedrock geologic map of the Sunderland quadrangle, Bennington and Windham Counties, Vermont: U.S. Geological Survey Miscellaneous Field Stud- ies Map MF–2224, scale 1:24,000. (Also available at http://ngmdb. usgs.gov/Prodesc/proddesc_5858.htm.) Burton, W.C., and Ratcliffe, N.M., 2000, Digital and preliminary bedrock geologic map of the Wallingford quadrangle, Vermont: U.S. Geological Survey Open-File Report 99–337–A, 1 sheet, scale 1:24,000; 99–337–B, digital database for part A, 3 disks (3.5 inches). (Also available at http://www.anr.state.vt.us/dec/geo/digitofr.htm.) Cady, W.M., 1945, Stratigraphy and structure of west-central Vermont: Geological So- ciety of America Bulletin, v. 56, no. 5, p. 515–587; pl. in pocket, scale 1:62,500. Cady, W.M., 1956, Bedrock geology of the Montpelier quadrangle, Vermont: U.S. Geo- logical Survey Geologic Quadrangle Map GQ–79, scale 1:62,500. Cady, W.M., Albee, A.L., and Chidester, A.H., 1963, Bedrock geology and asbestos de- posits of the upper Missisquoi Valley and vicinity, Vermont, chap. B of Contributions to economic geology, 1960: U.S. Geological Survey Bulletin 1122, p. B–1 to B–78, 1 pl., scale 1:62,500. (Also available at http://pubs.usgs.gov/bul/1122b/report.pdf and http://ngmdb.usgs.gov/Prodesc/proddesc_20823.htm.) Carter, C.M., 1979, Interpretation of the Hinesburg thrust north of the Lamoille River, northwestern Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 84 p. Chang, P.H., Ern, E.H., Jr., and Thompson, J.B., Jr., 1965, Bedrock geology of the Woodstock quadrangle, Vermont: Vermont Geological Survey Bulletin 29, 65 p., 2 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/ dec/geo/bulletins.htm.) Cherichetti, L.C., 1995, Stratigraphy and structural geology of the Pinnacle Formation between the Lamoille and Winooski Rivers, northwestern Vermont: Vermont Geo- logical Survey Open-File Report VG95–1, 10 p., 3 pls., scale 1:24,000. (Also avail- able at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Cherichetti, L.C., 1996, Lithostratigraphy, deposition, and rift model analysis of the Pinnacle Formation between the Lamoille and Winooski Rivers in northwestern Ver- mont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 122 p. Chidester, A.H., Albee, A.L., and Cady, W.M., 1978, Petrology, structure, and genesis of the asbestos-bearing ultramafic rocks of the Belvidere Mountain area in Vermont: U.S. Geological Survey Professional Paper 1016, 95 p., 4 pls., scale 1:12,000. (Also available at http://pubs.usgs.gov/pp/1016/.) Chidester, A.H., Hatch, N.L., Jr., Osberg, P.H., Norton, S.A., and Hartshorn, J.H., 1967, Geologic map of the Rowe quadrangle, Franklin and Berkshire Counties, Mas- sachusetts, and Bennington and Windham Counties, Vermont: U.S. Geological Sur- vey Geologic Quadrangle Map GQ–642, scale 1:24,000. Condon, R., and Harding, L., 1996, unpublished data for the South Mountain 7.5- minute quadrangle, Vermont. Cua, A.K., 1989, Geology and geochemistry of metabasaltic rocks from the Roxbury area, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 256 p. DelloRusso, Vincent, and Stanley, R.S., 1986, Bedrock geology of the northern part of the Lincoln Massif, central Vermont: Vermont Geological Survey Special Bulletin 8, 56 p., 4 pls., scales 1:12,000 and 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.) Dennis, J.G., 1964, The geology of the Enosburg area, Vermont: Vermont Geological Survey Bulletin 23, 56 p., 3 pls., scale 1:62,500. DiPietro, J.A., 1983, Geology of the Starksboro area, Vermont: Vermont Geological Survey Special Bulletin 4, 14 p., 2 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.) Doll, C.G., Cady, W.M., Thompson, J.B., Jr., and Billings, M.P., 1961, Centennial geo- logic map of Vermont: [Montpelier,] Vermont Geological Survey, scale 1:250,000. (Also available at http://www.anr.state.vt.us/dec/geo/centmap.htm.) Doolan, Barry, 1995, Digital bedrock geologic map of the Gilson Mountain 7.5 minute quadrangle, Vermont: Vermont Geological Survey Open-File Report VG95–7A, 2 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.) Doolan, Barry, comp., 1999, Compilation bedrock geologic map of the Jay Peak quad- rangle, Vermont: Vermont Geological Survey Open-File Report VG99–1, 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Doolan, B, Brooks, K., Copans, B., Hengstenberg, C., and Sonenberg, D., 1999, Bed- rock geology of the Cold Hollow Mountains quadrangle, Vermont: Vermont Geologi- cal Survey Open-File Report VG99–4, 6 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Doolan, Barry, Cherichetti, Lars, Holt, Jon, Ryan, Jeremy, Hengstenberg, Carey, and Rosencrantz, Eric, 2003, Bedrock geology of the Underhill quadrangle, Vermont: Vermont Geological Survey Open-File Report VG03–4B, scale 1:24,000. (Also avail- able at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Doolan, B.L., Hatch, N.L., Jr., Thompson, P.J., Gale, M.H., and Kim, Jonathan, 2002, unpublished data for the Mt. Mansfield 30 × 60 minute quadrangle, Vermont. Dorsey, R.J., 1983, Geological synthesis of the Milton quadrangle, northwestern Ver- mont; A new interpretation: Burlington, Vt., University of Vermont, unpub. B.S. the- sis, 103 p. Dorsey, R.J., Agnew, P.C., Carter, C.M., Rosencrantz, E.J., and Stanley, R.S., 1983, Bedrock geology of the Milton quadrangle, northwestern Vermont: Vermont Geologi- cal Survey Special Bulletin 3, 14 p., 4 pls., scales 1:24,000 and 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.) Dorsey, Rebecca, Doolan, Barry, Agnew, Paul, Carter, Craig, Rosencrantz, Eric, and Stanley, Rolfe, 1995, Digital compilation bedrock geologic map of the Milton quad- rangle, Vermont: Vermont Geological Survey Open-File Report VG95–8A, 2 pls., scale 1:24,000; VG95–8B, database for part A. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Eiben, D.B., 1976, Stratigraphy and structure of the Stimson Mountain area, Camels Hump quadrangle, north central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 112 p. Eric, J.H., and Dennis, J.G., 1958, Geology of the Concord-Waterford area, Vermont: Vermont Geological Survey Bulletin 11, 66 p., 2 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.) Erwin, R.B., 1957, The geology of the limestone of Isle La Motte and South Hero Is- land, Vermont: Vermont Geological Survey Bulletin 9, 94 p., 2 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.) Fisher, D.W., 1985, Bedrock geology of the Glens Falls-Whitehall region, New York: New York State Museum and Science Service, Map and Chart Series 35, 3 pls., scale 1:48,000, includes pamphlet, 58 p. Fowler, Phillip, 1950, Stratigraphy and structure of the Castleton area, Vermont: Ver- mont Geological Survey Bulletin 2, 83 p., 2 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.) Frederick, Jeffrey, 1996, unpublished data for the Middlebury 7.5-minute quadrangle, Vermont. Gale, M.H., 1980, Geology of the Belvidere Mountain Complex, Eden and Lowell, Ver- mont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 169 p. Gale, M.H., 1986, Geologic map of the Belvidere Mountain area, Eden and Lowell, Ver- mont: U.S. Geological Survey Miscellaneous Investigations Series Map I–1560, scale 1:20,000. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_9315.htm.) (Supersedes USGS Open-File Report 80–978.) Gale, M.H., and Kim, J., 1999, Compilation bedrock geologic map of the Hazens Notch quadrangle, Vermont: Vermont Geological Survey Open-File Report VG99–2, 2 pls., scale 1:24,000. Gale, M.H., Kim, J., Earle, H., Clark, A., Smith, T., and Petersen, K., 2009, Bedrock geologic map of Charlotte, Vermont: Vermont Geological Survey Open-File Report VG09-5, 3 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.) Gale, M.H., Kim, J., King, S., Montane, P., and Orsi, C., 2006, Bedrock geologic map of the southern Worcester Mountains watershed, Middlesex and Stowe 7.5 minute quadrangles, Vermont: Vermont Geological Survey Open-File Report VG2006–2, 3 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.) Gale, P.N., 1980, Geology of the Newport Center area, north central Vermont: Burling- ton, Vt., University of Vermont, unpub. M.S. thesis, 126 p. Gillespie, Richard, Stanley, Rolfe, Frank, Terry, and Barton, Thelma, 1972, Superposed folds and structural chronology along the southeastern part of the Hinesburg syn- clinorium, in New England Intercollegiate Geological Conference, 64th Annual Meet- ing, Burlington, Vermont, 1972, Guidebook for field trips in Vermont: p. 195–214. (Edited by B.L. Doolan and R.S. Stanley.) Goldberg, J., and Mehrtens, C.J., 1994, Bedrock geology of the Port Henry and north- western portion of the Middlebury quadrangles: Vermont Geological Survey Open- File Report VG94–3, 21 p., 1 pl., scale 1:24,000. Goodwin, B.K., 1963, Geology of the Island Pond area, Vermont: Vermont Geological Survey Bulletin 20, 111 p., 3 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.) Hadley, J.B., 1950, Geology of the Bradford-Thetford area, Orange County, Vermont: Vermont Geological Survey Bulletin 1, 36 p., 2 pls. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.) Hall, L.M., 1959, The geology of the St. Johnsbury quadrangle, Vermont and New Hampshire: Vermont Geological Survey Bulletin 13, 105 p., 5 pls., including geo- logic map, scale 1:62,500. (Also available at http://www.anr.state.vt.us/ dec/geo/bulletins.htm.) Handy, J., 1975, unpublished data for the Burlington 7.5-minute quadrangle, Vermont. Hatch, N.L., Jr., unpublished data for the eastern half of the Montpelier and Mt. Mans- field 30 × 60 minute quadrangles. Hatch, N.L., Jr., 1985–1991, unpublished data. Hatch, N.L., Jr., 1989, Reconnaissance bedrock geologic map of the South Royalton quadrangle, Vermont: U.S. Geological Survey Open-File Report 89–288, 8 p., 1 pl., scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/ proddesc_17623.htm, http://pubs.usgs.gov/of/1989/0288/plate-1.pdf, and http://pubs.usgs.gov/of/1989/0288/report.pdf.) Hatch, N.L., Jr., 1990, Reconnaissance bedrock geologic map of the rocks northwest of the Monroe fault, Concord quadrangle, Vermont: U.S. Geological Survey Open- File Report 90–283, 11 p., 1 pl., scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_17899.htm and http://pubs.usgs.gov/ of/1990/0283/report.pdf.) Hatch, N.L., Jr., 1991, Reconnaissance bedrock geologic map of the Randolph Center quadrangle, Vermont: U.S. Geological Survey Open-File Report 91–275, 8 p., 1 pl., scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/ proddesc_18102.htm, http://pubs.usgs.gov/of/1991/0275/report.pdf, and http://pubs.usgs.gov/of/1991/0275/report.pdf.) Hatch, N.L., Jr., and Hartshorn, J.H., 1968, Geologic map of the Heath quadrangle, Massachusetts-Vermont: U.S. Geological Survey Geologic Quadrangle Map GQ–735, scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/ proddesc_2042.htm.) Haydock, S.R., 1988, Tectonic geology of the Waitsfield-Warren area, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 209 p. Haydock, S.R., and Walsh, G.J., 1996, Digital compilation bedrock geologic map of the western part of the Waitsfield quadrangle, Vermont: Vermont Geological Survey Open-File Report VG96–3A, 2 pls., scale 1:24,000; VG96–3B, database for part A. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Hayes, C.G., 1978, The geology of the Shushan quadrangle, New York-Vermont: Ithaca, N.Y., Cornell University, unpub. M.S. thesis, 58 p., 3 pls., scale 1:24,000. Hepburn, J.C., Trask, N.J., Rosenfeld, J.L., and Thompson, J.B., Jr., 1984, Bedrock geology of the Brattleboro quadrangle, Vermont-New Hampshire: Vermont Geologi- cal Survey Bulletin 32, 162 p., 2 pls., including geologic map, scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.) Hewitt, P.C., and LaBrake, R.F., 1961, The geology of the Equinox quadrangle and vi- cinity, Vermont: Vermont Geological Survey Bulletin 18, 83 p., 6 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.) Hoar, R.S., 1981, The bedrock geology of the Coventry area, Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 139 p. Johansson, W.I., 1963, Geology of the Lunenburg-Brunswick-Guildhall area, Vermont: Vermont Geological Survey Bulletin 22, 86 p., 3 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.) Kim, J., 1997, Bedrock geologic map of parts of the Eden, Albany, Lowell, and Irasburg quadrangles: Vermont Geological Survey Open-File Report VG97–5, 6 p., 2 pls., scale 1:24,000. Kim, Jonathan, Gale, Marjorie, King, S.M., Orsi, C.M., and Pascale, L.R., 2003, Bed- rock geology of the Montpelier quadrangle, Vermont: Vermont Geological Survey Open-File Report VG03–1, 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Kim, Jonathan, Gale, Marjorie, Thompson, Peter, and Derman, Karen, 2007, Bedrock geologic map of the town of Williston, Vermont: Vermont Geological Survey Open- File Report VG07–4, 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Kim, Jonathan, Springston, George, and Gale, Marjorie, 1998, Digital bedrock geologic map of the Eden quadrangle, Vermont: Vermont Geological Survey Open-File Report VG98–3, 2 pls., scale 1:24,000; VG98–3B, database for VG98–3. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Kim, Jonathan, and Thompson, Peter, 2001, Bedrock geologic map of the Colchester quadrangle[, Vermont]: Vermont Geological Survey Open-File Report VG01–1, 3 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.) Kimball Falta, Christine, 1991, Tectonic geology of the Rochester-Hancock area, Roch- ester quadrangle, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 248 p. Kraus, J.F., 1989, Geology of the Northfield Mountains, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 145 p. Lapp, E.T., and Stanley, R.S., 1986, Bedrock geology of the Mt. Grant-South Lincoln area, central Vermont: Vermont Geological Survey Special Bulletin 7, 27 p., 3 pls., scale 1:12,000. (Also available at http://www.anr.state.vt.us/dec/geo/ specbulls.htm.) Lyons, J.B., 1955, Geology of the Hanover quadrangle, New Hampshire-Vermont: Geological Society of America Bulletin v. 66, no. 1, p. 104–145, includes geologic map, scale 1:62,500, doi:0.1130/0016-7606(1955)66[105:GOTHQN]2.0.CO;2. Lyons, J.B., 1958, Geology of the Hanover quadrangle[, New Hampshire-Vermont]: Concord, N.H., New Hampshire State Planning and Development Commission, 41 p., includes geologic map, scale 1:62,500. Lyons, J.B., Bothner, W.A., Moench, R.H., and Thompson, J.B., Jr., 1997, Bedrock geologic map of New Hampshire: Reston, Va., U.S. Geological Survey, 2 sheets, scales 1:250,000 and 1:500,000. Lyttle, P.T., 1995, Digital bedrock geologic map of the Arlington quadrangle and Ver- mont portion of the Shushan quadrangle, Vermont: U.S. Geological Survey Open- File Report 95–483–A, 2 pls., scale 1:24,000; 95–483–B, digital database for part A, 2 disks (3.5 inches). (Also available at http://pubs.usgs.gov/of/1995/0483a/.) (Also available as Vermont Geological Survey Open-File Reports VG95–483 and 483A at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Lyttle, P.T., unpublished data. MacFadyen, J.A., Jr., 1956, The geology of the Bennington area, Vermont: Vermont Geological Survey Bulletin 7, 72 p., 3 pls., scale 1:62,500. (Plates also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.) Mallard, L.D., 2000, Stratigraphic structural, and fault history analyses of the Richmond 7.5' quadrangle, north-central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 157 p. Mango, Helen, 1997, Bedrock geologic map of the Orwell quadrangle[, Vermont]: Ver- mont Geological Survey Open-File Report VG97–6, 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Martin, D.C., 1993, unpublished data for the Roxbury 7.5-minute quadrangle, Vermont. Martin, D.C., 1994, Geology of the Mississquoi Group and the Acadian orogeny in cen- tral Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 247 p., 8 pls. Martin, D.C., Cua, A.C., and Stanley, R.S., 1995, Digital compilation bedrock geologic map of the Roxbury quadrangle and eastern part of the Warren quadrangle, Vermont: Vermont Geological Survey Open-File Report VG95–2A, 2 pls., scale 1:24,000; VG95–2B, database for part A. Mehrtens, C.J., 1996a, unpublished data for the Burlington 7.5-minute quadrangle, Vermont. Mehrtens, C.J., 1996b, unpublished data for the Monkton Boro 7.5-minute quadrangle, Vermont. Mehrtens, C.J., 1996c, unpublished data for the Mount Philo 7.5-minute quadrangle, Vermont. Mehrtens, C.J., 1996d, Digital compilation bedrock geologic map of the Lake Cham- plain North one-degree sheet, Vermont: Vermont Geological Survey Open-File Re- port VG96–02A, 2 pls., scale 1:100,000; VG96–02B, database for part A. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Mehrtens, C.J., 1997, Digital compilation bedrock geologic map of the Lake Champlain South one-degree sheet, Vermont: Vermont Geological Survey Open-File Report VG97–01A, 2 pls., scale 1:100,000; VG97–01B, database for part A. (Also avail- able at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Mehrtens, C.J., and Borre, M.A., 1989, Stratigraphy and bedrock geology of parts of the Colchester and Georgia Plains quadrangles, northwestern Vermont: Vermont Geological Survey Special Bulletin 11, 29 p., 2 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.) Mehrtens, C.J., and Dorsey, R.J., 1987, Stratigraphy and bedrock geology of the north- western portion of the St. Albans quadrangle and the adjacent Highgate Center quad- rangle, Vermont: Vermont Geological Survey Special Bulletin 9, 28 p., 3 pls., scales 1:12,000 and 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ specbulls.htm.) Mehrtens, C.J., and Hadley, A.C.H., 1995, Bedrock geology of parts of the St. Albans and Georgia 7.5' quadrangles[, northwestern Vermont]: Vermont Geological Survey Special Bulletin 14, 18 p., 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.) Mehrtens, C.J., Doolan, B.L., Gale, M.H., Stanley, R.S., and Thompson, P.J., 2000, unpublished data for the Lake Champlain North 30 × 60 minute quadrangle. Mehrtens, C.J., Stanley, R.S., Gale, M.H., and Thompson, P.J., 2000, unpublished data for the Lake Champlain South 30 × 60 minute quadrangle. Metz, R., 1980, Geologic map of the Cambridge quadrangle, New York: New York State Geological Survey, Open-File Map 1g 081, scale 1:24,000. Mock, T.D., 1989, Bedrock geology of the East Fletcher-Bakersfield area, northern Ver- mont: Vermont Geological Survey Special Bulletin 10, 28 p., 3 pls., scale 1:12,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.) Moench, R.H., 1990, The Piermont allochthon, northern Connecticut Valley area, New England—Preliminary description and resource implications, chap. J of Slack, J.F., ed., Summary results of the Glens Falls CUSMAP Project, New York, Vermont, and New Hampshire: U.S. Geological Survey Bulletin 1887, p. J1–J23. (Also available at http://pubs.usgs.gov/bul/1887/.) Moench, R.H., 2001, unpublished data for the Barnet and Woodsville 7.5-minute quad- rangles, Vermont. Moench, R.H., Boone, G.M., Bothner, W.A., Boudette, E.L., Hatch, N.L., Jr., Hussey, A.M., II, and Marvinney, R.G., 1995, Geologic map of the Sherbrooke-Lewiston area, Maine, New Hampshire, and Vermont, United States, and Québec, Canada, with Contributions to geochronology by J.N. Aleinikoff: U.S. Geological Survey Mis- cellaneous Investigations Series Map I–1898–D, 2 sheets, scale 1:250,000, includes pamphlet, 56 p. Myers, P.B., Jr., 1964, Geology of the Vermont portion of the Averill quadrangle, Ver- mont: Vermont Geological Survey Bulletin 27, 69 p., 2 pls., including geologic map, scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/ bulletins.htm.) O’Loughlin, S.B., and Stanley, R.S., 1986, Bedrock geology of the Mount Abraham- Lincoln Gap area, central Vermont: Vermont Geological Survey Special Bulletin 6, 29 p., 3 pls., scale 1:12,000. (Also available at http://www.anr.state.vt.us/ dec/geo/specbulls.htm.) Osberg, P.H., 1959, The stratigraphy and structure of the Coxe Mountain area, Ver- mont, trip F in New England Intercollegiate Geological Conference, 51st Annual Meeting, Rutland, Vermont, 1959: p. 45–52. (Edited by E-an Zen.) Platt, L.B., 1960, Structure and stratigraphy of the Cossayuna area New York: New Haven, Conn., Yale University, unpub. Ph.D. thesis, 126 p., 6 pls., scale 1:24,000. Potter, D.B., 1972, Stratigraphy and structure of the Hoosick Falls area, New York- Vermont, east-central Taconics: New York State Museum and Science Service, Map and Chart Series 19, 71 p., includes geologic map, scale 1:24,000. Prahl, C., 1985, The geology of the Middle Proterozoic rocks of the Lincoln massif of west-central Vermont and their suitability for long term storage of high level nuclear waste: Burlington, Vt., University of Vermont, unpub. B.S. thesis, 42 p. Prewitt, J.M., 1989, Bedrock geology of the Warren-Granville Gulf area, central Ver- mont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 137 p. Rankin, D.W., 1994, Preliminary bedrock geologic map of parts of the Lower Water- ford, Concord, Littleton, and Miles Pond 7 1/2-minute quadrangles, Vermont and New Hampshire: U.S. Geological Survey Open-File Report OF–94–410, 28 p., 3 pls., scale 1:24,000. (Text also available at http://pubs.usgs.gov/of/ 1994/0410/report.pdf.) Rankin, D.W., 1996, Bedrock geology of the Littleton, Vermont-New Hampshire 15- minute quadrangle northwest of the Ammonoosuc fault, with a section on The ana- lytical methods and isotopic age investigation of pegmatitic metadiorite of the intru- sive suite of Comerford Dam, by Robert D. Tucker, in New England Intercollegiate Geological Conference, 88th Annual Meeting, Mount Washington, N.H., September 27, 28, and 29, 1996, Guidebook to field trips in northern New Hampshire and adja- cent regions of Maine and Vermont: Cambridge, Mass., Harvard University, p. 5–37. (Edited by M.R. Van Baalen.) Rankin, D.W., 1997, unpublished data for the Mt. Washington and Montpelier 30 × 60 minute quadrangles. Rankin, D.W., 2008, unpublished data. Rankin, D.W., and Tucker, R.D., 2007, The Piermont allochthon revisited and redefined at its type locality—Discussion: Geological Society of America Bulletin, v. 119, nos. 3–4, p. 500–502, doi:10.1130/B26089. Ratcliffe, N.M., 1992, Preliminary bedrock geologic map of the Mount Holly quad- rangle, and portions of the Ludlow quadrangle, Rutland and Windsor Counties, Ver- mont: U.S. Geological Survey Open-File Report 92–282–A, 16 p., 2 pls., scale 1:24,000.; 92–282–B, 5 slides. (Part A is also available at http://pubs.usgs.gov/ of/1992/0282a/.) Ratcliffe, N.M., 1993, Bedrock geologic map of the Mount Snow and Readsboro quad- rangles, Bennington and Windham Counties, Vermont: U.S. Geological Survey Mis- cellaneous Investigations Series Map I–2307, 1 sheet, scale 1:24,000, includes pam- phlet, 9 p. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_ 10234.htm.) (See also digital data in Ratcliffe, 1995c, Vermont Geological Survey Open-File Report VG95–DM1.) Ratcliffe, N.M., 1994, [Note] 2. The Wilcox Formation of Vermont assigned to the Mount Holly Complex, in Stratigraphic notes, 1992: U.S. Geological Survey Bulletin 2060, p. 11–18, 1 pl., scale 1:48,000. (Also available at http://pubs.usgs.gov/ bul/2060/.) Ratcliffe, N.M., 1995a, Digital bedrock geologic map of the Cavendish quadrangle, Ver- mont: U.S. Geological Survey Open-File Report 95–203–A, 2 pls., scale 1:24,000; 95–203–B, digital database for part A, 2 disks (3.5 inches). (Part A is also available at http://pubs.usgs.gov/of/1995/0203a/.) Ratcliffe, N.M., 1995b, Digital bedrock geologic map of the Chester quadrangle, Ver- mont: U.S. Geological Survey Open-File Report 95–576–A, 2 pls., scale 1:24,000; 95–576–B, digital database for part A, 2 disks (3.5 inches). Ratcliffe, N.M., 1995c, Digital bedrock geologic map of the Mount Snow and Reads- boro quadrangles, Vermont: Vermont Geological Survey Open-File Report VG95–DM1, 1 diskette, scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) (Supplements Ratcliffe, 1993, U.S. Geological Survey Miscellaneous Investigations Series Map I–2307.) Ratcliffe, N.M., 1996, Digital bedrock geologic map of the Andover quadrangle, Ver- mont: U.S. Geological Survey Open-File Report 96–31–A, 2 pls., scale 1:24,000; 96–31–B, digital database for part A. (Part A is also available at http://pubs.usgs.gov/of/1996/0031a/.) (Report is also available as Vermont Geo- logical Survey Open-File Reports VG96–31A and 31B; both parts are at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Ratcliffe, N.M., 1997a, Bedrock geologic map of the Jamaica and part of the Towns- hend quadrangles, Windham and Bennington Counties, Vermont: U.S. Geological Survey Miscellaneous Investigations Series Map I–2453, 2 pls., scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_13037.htm.) Ratcliffe, N.M., 1997b, Digital and preliminary bedrock geologic map of the Chittenden quadrangle, Vermont: U.S. Geological Survey Open-File Report 97–854–A, 1 pl., scale 1:24,000; 97–854–B, digital database for part A, 2 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG97–854A and 854B at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Ratcliffe, N.M., 1997c, Preliminary bedrock geologic map of the Chittenden quad- rangle, Rutland County, Vermont: U.S. Geological Survey Open-File Report 97–703, 36 p., 3 pls., scale 1:24,000. (Also available at http://pubs.usgs.gov/ of/1997/0703/.) Ratcliffe, N.M., 1998, Digital and preliminary bedrock geologic map of the Rutland quadrangle, Vermont: U.S. Geological Survey Open-File Report 98–121–A, 1 pl., scale 1:24,000; 98–121–B, digital database for part A, 2 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG98–121A and 121B at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Ratcliffe, N.M., 2000a, Bedrock geologic map of the Cavendish quadrangle, Windsor County, Vermont: U.S. Geological Survey Geologic Quadrangle Map GQ–1773, 1 pl., scale 1:24,000, includes pamphlet, 19 p. (Also available at http://ngmdb.usgs.gov/ Prodesc/proddesc_33543.htm.) Ratcliffe, N.M., 2000b, Bedrock geologic map of the Chester quadrangle, Windsor County, Vermont: U.S. Geological Survey Geologic Investigations Series Map I–2598, 1 pl., scale 1:24,000, includes pamphlet, 16 p. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_33542.htm.) Ratcliffe, N.M., 1990–2008, unpublished data. Ratcliffe, N.M., and Armstrong, T.R., 1996, Digital bedrock geologic map of the Sax- tons River 7.5 × 15 minute quadrangle, Vermont: U.S. Geological Survey Open-File Report 96–52–A, 2 pls., scale 1:24,000; 96–52–B, digital database for part A, 4 disks (3.5 inches). (Part A is also available at http://pubs.usgs.gov/of/ 1996/0052a/.) (Also available as Vermont Geological Survey Open-File Reports VG96–52A and 52B at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) Ratcliffe, N.M., and Armstrong, T.R., 1999, Bedrock geologic map of the West Dover and Jacksonville quadrangles, Windham County, Vermont: U.S. Geological Survey Miscellaneous Investigations Series Map I–2552, 2 pls., scale 1:24,000, includes pamphlet, 30 p. (Also available at http://pubs.usgs.gov/imap/2552/ and http://ngmdb.usgs.gov/Prodesc/proddesc_22689.htm.) Ratcliffe, N.M., and Armstrong, T.R., 2001, Bedrock geologic map of the Saxtons River 7.5' × 15' quadrangle, Windham and Windsor Counties, Vermont: U.S. Geological Survey Geologic Investigations Series Map I–2636, 2 sheets, scale 1:24,000, includes pamphlet, 21 p. (Also available at http://ngmdb.usgs.gov/Prodesc/ proddesc_42276.htm and http://pubs.usgs.gov/imap/2636/.) Ratcliffe, N.M., and Burton, W.C., 1989, Preliminary bedrock map of the Stratton Mountain quadrangle, Vermont: U.S. Geological Survey Open-File Report 89–200, 1 pl., scale 1:24,000, includes pamphlet, 11 p. 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C11. D1. D2. D3. D4. H5. H6. H7. H8. H9. H10. D5. D6. D7. D8. D9. D10. D11. D12. E1. E2. E3. F1. F2. F3. G1. G2. G3. G4. G5. G6. G7. G8. G9. H1. H2. H3. H4. H13. H14. H15. J1. K1. K2. K3. K4. K5. K6. K7. L1. L2. L3. L4. L5. L6. M1. M2. M3. M4. M5. M6. M7. M8. M9. M10. M11. M12. M13. M14. M15. M16. M17. M18. M19. M20. M21. M22. O1. O2. P1. P2. P3. P4. R1. R2. R3. R4. R5. R6. R7. R8. R9. R10. R11. R12. R13. R14. R15. R16. R17. R18. R19. R20. R25. R26. R27. R28. R29. S1. S2. S3. S4. S5. S6. S7. S8. S9. S10. S11. S12. S13. S14. S15. S16. S17. T1. T2. T3. T4. T5. T6. T8. T7. T9. T10. T11. T12. T13. V1. W1. W2. W3. W4. W5. W6. W7. W8. W9. W10. W11. W12. W13. W14. W15. W16. W17. W18. Z1. Z2. Z3. Z4. H12. H11. R23. R22. R24. R21. Doolan Gale Mehrtens Stanley Thompson Gale Mehrtens Stanley Thompson Doolan Gale Hatch Kim Thompson Gale Hatch Rankin Stanley Thompson Walsh Rankin Ratcliffe Rankin Ratcliffe Ratcliffe Walsh Rankin Ratcliffe Walsh Ratcliffe Ratcliffe Ratcliffe Ratcliffe LAKE CHAMPLAIN NORTH LAKE CHAMPLAIN SOUTH MOUNT MANSFIELD MONTPELIER MOUNT WASHINGTON GROVETON CLAREMONT RUTLAND ALBANY GLENS FALLS TICONDEROGA KEENE Sample Map Unit Map Sheet Description Age Reference (see References Cited for this table) Table 1.—Summary of uranium-lead (U-Pb) zircon ages of rocks from Vermont. [Sample numbers are shown on the map and on the geologic structure map] Hornblende diorite gneiss at South Londonderry Baileys Mills tonalitic gneiss in the Chester dome Rawsonville trondhjemite gneiss at Bromley Mountain Felchville Gneiss (aplitic facies) at Cavendish Gorge Felchville Gneiss (trondhjemite facies) at Felchville Aplite facies of Rawsonville trondhjemitic gneiss, previously assigned to Bondville trondhjemitic gneiss Bondville metadacite at Winhall River bridge Cole Pond tonalite gneiss Migmatitic gneiss at Stratton Mountain Fine-grained granodiorite at Ludlow Mountain Okemo Quartzite; detrital zircons College Hill Granite Gneiss; crosscuts older and deformed intrusives and paragneiss Granitic gneiss crosscutting older and deformed intrusives (1.3–1.4-Ga suite) and paragneiss Megacrystic granite gneiss at Brandon Gap Megacrystic granite gneiss east of Chittenden Reservoir Megacrystic granite gneiss on the eastern side of the Green Mountain massif Migmatite gneiss in the Pine Hill slice Bull Hill Gneiss (of Richardson, 1931) in the Chester dome Bull Hill Gneiss (of Richardson, 1931) on the west side of the Athens dome Somerset Reservoir Granite Stamford Granite near the Massachusetts border Rhyolitic metafelsite in the Pinney Hollow Formation Newfane tonalite intruding the Cram Hill Formation near South Newfane Trondhjemite in the Barnard Gneiss proper (of Richardson, 1924) north of Proctorsville Tonalite gneiss in the North River Igneous Suite near Bartonsville Felsic volcanic layer interlayered with mafic volcanics in the Cram Hill Formation at Springfield Trondhjemite in the Barnard Gneiss proper (of Richardson, 1924) south of Bethel Joslin Turn pluton Highlandcroft pluton Lost Nation granite Lost Nation granite Lost Nation granite; U-Pb sphene age Felsic rock in the Waits River Formation Comerford Intrusive Complex at Comerford quarry Comerford Intrusive Complex at Leighton Hill Comerford Intrusive Complex dike at Peaked Mountain Diorite in the Braintree Intrusive Complex Unmapped felsic dike of Sbg in Onbm near Bridgewater Granite in the Braintree Intrusive Complex Trondhjemite of the Newport Intrusive Complex Metarhyolite dike in the Albee Formation Metarhyolite dike in the Albee Formation Fairlee Quartz Monzonite Bethlehem Gneiss in the pluton at Bellows Falls Metarhyolite in the Littleton Formation Rhyolite in felsic metavolcanic member of the Gile Mountain Formation Granite in the Chester dome Barre Granite Black Mountain pluton Granite dike south of Plymouth French Pond Granite Volcanic zircons in quartzite in the Gile Mountain Formation at Royalton 1 2 3 4 5 6 6B 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 Y 1 dg Y 1 bm Y 1 rt Y 1 fga Y 1 fg Y 1 rta Y 2 bv Y 2 cp Y 2 mig Y 2 lgg Y 2 lq Y 2 ch Y 2 gg Y 3A mb Y 3A ma Y 3A ma Y 3B p Y 3C cbbh Y 3C cbbh Y 3C cbsr Y 3C cbs Zphf Onnt Onb Ont Ochv Onb Oj Ohi Ol Ol Ol DSwf Scm Scm Scm Sbd Onbm Sbg Snd Dr Dr Dfqm Dbgn Dlr Dgmr Dg Dbbg Dbmg Dg Dfpg Dgr South South South South South South South South South South South South South South South South South South South South South South South South South South South North North North North North South North North North North South North North North North North South North North South North South South North South 1,393 ± 9 Ma 1,383 ± 13 Ma 1,367 ± 16 Ma 1,372 ± 11 Ma 1,370 ± 11 Ma 1,348 ± 3 Ma 1,342 Ma 1,321 ± 9 Ma 1,326 ± 4 Ma 1,309 ± 6 Ma ~1,261 to 1,359 Ma 1,244 ± 8 Ma 1,221 ± 4 Ma 1,149 ± 8 Ma 1,121 ± 1.4 Ma 1,119 ± 3.3 Ma 1,037 ± 6 Ma 945 ± 7 Ma 955 ± 5 Ma 965 ± 4 Ma 962 ± 1 Ma 571 ± 5 Ma 502 ± 4 Ma 496 ± 8 Ma 486 ± 3 Ma 483 ± 3 Ma 471.4 ± 3.7 Ma 469 ± 1.5 Ma 450 ± 5 Ma 444.1 ± 2.1 Ma 442 ± 4 Ma 443 ± 3 Ma 423 ± 4 Ma 419.8 ± 2.6 Ma 419.3 ± 1.3 Ma 418.5 ± 2 Ma 419 ± 0.39 Ma 418 ± 1 Ma 421 ± 7 Ma 425 ± 3 Ma 414 ± 4 Ma 412 ± 2 Ma 410 ± 5 Ma 407 ± 5 Ma 407.5 ± 3.9 Ma 407.0 ± 3.3 Ma 392 ± 6 Ma 368 ± 4 Ma 364 ± 4 Ma 365 ± 5 Ma 365 ± 5 Ma 409 ± 5 Ma Aleinikoff and others (2011) Aleinikoff and others (2011) Ratcliffe and others (1991); Aleinikoff and others (2011) Aleinikoff and others (2011) Aleinikoff and others (2011) Ratcliffe and others (1991) Ratcliffe and others (1991); Aleinikoff and others (2011) Ratcliffe and others (1991); Aleinikoff and others (2011) Aleinikoff and others (2011) Aleinikoff and others (2011) Aleinikoff and others (2011) Ratcliffe and others (1991); Aleinikoff and others (2011) Ratcliffe and others (1991); Aleinikoff and others (2011) Aleinikoff and others (2011) Karabinos and Aleinikoff (1990) Karabinos and Aleinikoff (1990) Aleinikoff and others (2011) Karabinos and Aleinikoff (1990) Karabinos and Aleinikoff (1990) Karabinos and Aleinikoff (1990) Karabinos and Aleinikoff (1990) Walsh and Aleinikoff (1999) Aleinikoff and others (2011) Aleinikoff and others (2011) Aleinikoff and others (2011) Aleinikoff and others (2011) Karabinos and others (1998) Moench and Aleinikoff (2003) Lyons and others (1986) Rankin and Tucker (2009) Moench and Aleinikoff (2003) Moench and Aleinikoff (2003) Aleinikoff and Karabinos (1990); Hueber and others (1990) Rankin and others (2007) Rankin and others (2007) Rankin and others (2007) Black and others (2004) Aleinikoff and Karabinos (1990) Aleinikoff and others (2011) Aleinikoff and others (2011) Lyons and others (1997); Moench and others (1995) Lyons and others (1997); Moench and others (1995) Moench and Aleinikoff (2003) Kohn and others (1992) Rankin and Tucker (2000) Rankin and Tucker (2009) Aleinikoff and others (2011) Aleinikoff and others (2011) Aleinikoff and others (2011) Aleinikoff and others (2011) Moench and Aleinikoff (2003) McWilliams and others (2010) REFERENCES CITED IN TABLE 1 [These references are also included in the References Cited that follow the Description of Map Units on the front of this sheet] SCIENTIFIC INVESTIGATIONS MAP 3184 BEDROCK GEOLOGIC MAP OF VERMONT SHEET 3 OF 3 (BACK) U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY MARCIA K. McNUTT, DIRECTOR Prepared in cooperation with the STATE OF VERMONT, VERMONT AGENCY OF NATURAL RESOURCES, VERMONT GEOLOGICAL SURVEY LAURENCE R. BECKER, STATE GEOLOGIST BEDROCK GEOLOGIC MAP OF VERMONT By Nicholas M. Ratcliffe, 1 Rolfe S. Stanley, 2* Marjorie H. Gale, 3 Peter J. Thompson, 3 and Gregory J. Walsh 1 With contributions by Norman L. Hatch, Jr., 1* Douglas W. Rankin, 1 Barry L. Doolan, 2 Jonathan Kim, 3 Charlotte J. Mehrtens, 2 John N. Aleinikoff, 1 and J. Gregory McHone 4 1 U.S. Geological Survey, 2 University of Vermont, 3 Vermont Geological Survey, 4 Wesleyan University, * Deceased. 2011 Cartography by Linda M. Masonic 1 This map is available for sale by U.S. Geological Survey, Information Services, Box 25286, Denver Federal Center, Denver, CO 80225 For product and ordering information: World Wide Web: http://www.usgs.gov; Telephone 1-888-ASK-USGS Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government Printed on recycled paper Suggested citation: Ratcliffe, N.M., Stanley, R.S., Gale, M.H., Thompson, P.J., and Walsh, G.J., 2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific Investigations Map 3184, 3 sheets, scale 1:100,000. GIS database compiled by Gregory J. Walsh and Marjorie H. Gale Digital cartography by Linda M. Masonic Edited by James R. Estabrook The Vermont Geological Survey would like to thank former State Geologists Charles Ratte for initiating State support and Diane Conrad for continued work on this map. ´
Transcript of BEDROCK GEOLOGIC MAP OF VERMONT › PubDocs › DEC › GEO › VTBedrockMap › SIM31… ·...
QUEBEC, CANADA
MASSACHUSETTS
NEW
YORK
HAM
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NEW
QUEBEC, CANADA
MASSACHUSETTS
NEW
YORK
HAM
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NEW
´
´45°
73° 22’ 30” 72° 30’ 71° 30’
71° 30’
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44° 30’
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44° 30’
44° 44°
43° 30’ 43° 30’
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42° 37’ 30” 42° 37’ 30”
73° 30’
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73° 22’ 30” 72° 30’73°
10 0 10 20 30 40 KILOMETERS
SCALE 1: 700 000
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ROUSES POINT OE N.
EAST ALBURG OE N.
HIGHGATE
CENTER OE N.
SHELDON
SPRINGS OE N.
SHELDON
SPRINGS
ENOSBURG
FALLS OE N.
ENOSBURG
FALLS
RICHFORD OE N.
JAY PEAK OE N.
NORTH TROY OE N.
NEWPORT OE N.
NEWPORT
CENTER OE N.WEST
CHARLESTON OE N.
RICHFORD
JAY PEAK
NORTH TROY
NEWPORT
NEWPORT
CENTER WEST
CHARLESTON
MORGAN
CENTER OE N.
NORTON
POND OE N.
MORGAN
CENTERNORTON
POND
ROUSES POINT
BEEKMAN-
TOWNNORTH
HERO
ST. ALBANS BAY
ST. ALBANS
FAIRFIELD
BAKERSFIELDHAZENS
NOTCH LOWELL
IRASBURG
ORLEANS
WESTMORE
ISLAND POND
SPECTACLE
POND
COLD HOLLOW
MTS.
WESTPORT
VERGENNES
WESTVERGENNES
EASTBRISTOL
MOUNT ELLEN
WAITSFIELD
BARRE WEST
BARRE EAST
KNOX
MOUNTAIN
GROTON
WOODSVILLE
NORTHFIELD
PORT HENRY
SNAKE
MOUNTAIN
MIDDLEBURYSOUTH
MOUNTAIN
LINCOLN
WARREN
BROOKFIELD
WASHINGTONWEST
TOPSHAM EAST
CORINTH
NEWBURY
ROXBURY
CROWN
POINT
BRIDPORT
CORNWALLEAST
MIDDLEBURY
BREAD LOAF
HANCOCK
RANDOLPH
CENTERCHELSEA
VERSHIREFA
IRLEE
PIERMONT
RANDOLPH
PLATTSBURGH
SOUTH
HERO GEORGIA
PLAINSMILT
ON
GILSON
MOUNTAIN
JEFFERSONVILLEEDEN
ALBANY
CRAFTSBURY
CRYSTAL
LAKESUTTON
WEST BURKE
SENECA
MOUNTAIN
AVERILL OE N.
AVERILL
BLOOMFIELD
MAIDSTONE
LAKE
MONADNOCK
MOUNTAIN OE N.
MONADNOCK
MOUNTAIN
TINKERVILLE
STRATFORD
STONE
MOUNTAIN
GROVETON
JOHNSON
KEESEVILLE
COLCHESTER
POINT
COLCHESTERESSEX
CENTER
UNDERHILLMOUNT
MANSFIELD
MORRISVILLE
WOLCOTT
CASPIAN
LAKESTA
NNARD
LYNDONVILLE
BURKE
MOUNTAIN
GALLUP MILLS
LANCASTER
WHITEFACE
MOUNTAIN
JUNIPER
ISLANDBURLINGTON
ESSEX
JUNCTION
RICHMOND
BOLTON
MOUNTAIN
MOUNT
WORCESTER
WOODBURY
CABOT
JOES POND
ST. JOHNSBURY
CONCORD
LISBON
MILES POND
STOWE
CHARLOTTE
MOUNT PHILO
HINESBURG
HUNTINGTON
WATERBURY
MONTPELIER
PLAINFIELD
MARSHFIELD
PEACHAM
BARNETLOWER
WATERFORD
LITTLETON
BETHLEHEM
MIDDLESEX
EAST ALBURG
HIGHGATE
CENTER
BERLIN
WILLIAMSTOWN
ROWEHEATH
BERNARDSTON
NORTHFIELD
COLRAIN
TICONDEROGAORWELL
SUDBURY
BRANDON
ROCHESTER
SOUTH
ROYALTONSOUTH
STRAFFORDSMARTS
MOUNTAIN
MOUNT
CARMEL
SHARONLYME
BETHEL
PUTNAM
BENSON
BOMOSEEN
PROCTOR
PICO PEAK
CHITTENDEN
WOODSTOCK
NORTH
DELECTABLE
MOUNTAIN
QUECHEE
HANOVER
CANAAN
WHITEHALL
THORN HILL
POULTNEY
RUTLAND
PLYMOUTH
WOODSTOCK
SOUTH NORTH
HARTLAND
KILLINGTON
PEAKWEST
RUTLAND
HARTLAND
GRANVILLE
WELLS
WALLINGFORD
CAVENDISH
WINDSOR
LUDLOWMOUNT
HOLLY
MIDDLETOWN
SPRINGS
PAWLET
DANBY
DORSET
WESTONCHESTER
ANDOVERWEST
PAWLET
SPRINGFIELD
SALEMPERU
MANCHESTER
LONDONDERRY
SAXTONS RIVER
WINDHAMWEST
RUPERT
BELLOWS FALLS
SHUSHAN
ARLINGTON
SUNDERLAND
JAMAICA
TOWNSHEND
WESTMINSTER
WESTSTRATTON
MOUNTAIN
WALPOLE
BENNINGTON
WOODFORD
NEWFANE
PUTNEYMOUNT
SNOW WEST
DOVERHOOSICK
FALLS
SPOFFORD
POWNAL
STAMFORD
READSBORO
HINSDALE
BRATTLEBORO
JACKSONVILLE
GOVERNORS
MOUNTAIN
NORTH
POWNAL
NORTH
ADAMS
PITTSBURG
LOVERIN
G
MOUNTAIN
CLAREMONT
NORTH
CLAREMONT
SOUTH
ALSTEAD
GILSUM
FORT ANN
HARTFORD
COSSAYUNA
CAMBRIDGE
EAGLE BRID
GE
GRAFTON
INDEX TO GEOLOGIC MAPPINGBY 7.5-MINUTE QUADRANGLE
[Alphanumeric designations under quadrangle names are keyed to Sources of Geologic Map Data at right. The “OE N” in the names of the northern tier of quadrangles along the border with Quebec standsfor “overedge north”. Topographic maps are available at the USGS Store (http://store.usgs.gov).]
INDEX TO COMPILATION RESPONSIBILITYBY 30 x 60-MINUTE QUADRANGLE
(Contributors listed in alphabetical order)
Aleinikoff, J.N., and Karabinos, Paul, 1990, Zircon U-Pb data for the Moretown and Barnard Volcanic Members of the Missisquoi Formation and a dike cutting the Standing Pond Volcanics, southeastern Vermont, chap. D of Slack, J.F., ed., Summary results of the Glens Falls CUSMAP Project, New York, Vermont, and New Hampshire: U.S. Geological Survey Bulletin 1887, p. D1–D10. (Also available at http://pubs.usgs.gov/bul/1887/.)
Aleinikoff, J.N., Ratcliffe, N.M., and Walsh, G.J., 2011, Provisional zircon and monazite uranium-lead geochronology for selected rocks from Vermont: U.S. Geological Survey Open-File Report 2011–1309, 46 p., available only online at http://pubs.usgs.gov/of/2011/1309.
Black, L.P., Kamo, S.L., Allen, C.M., Davis, D.W., Aleinikoff, J.N., Valley, J.W., Mundil, Roland, Campbell, I.H., Korsch, R.J., Williams, I.S., and Foudoulis, Chris, 2004, Improved 206Pb/238U microprobe geochronology by the monitoring of a trace-element-related matrix effect; SHRIMP, ID-TIMS, ELA-ICP-MS and oxygen isotope documentation for a series of zircon standards: Chemical Geology, v. 205, nos. 1–2, p. 115–140.
Hueber, F.M., Bothner, W.A., Hatch, N.L., Jr., Finney, S.C., and Aleinikoff, J.N., 1990, Devonian plants from southern Québec and northern New Hampshire and the age of the Connecticut Valley trough: American Journal of Science, v. 290, no. 4, p. 360–395, doi:10.2475/ajs.290.4.360.
Karabinos, Paul, and Aleinikoff, J.N., 1990, Evidence for a major Middle Proterozoic post-Grenvillian igneous event in western New England: American Journal of Science, v. 290, no. 8, p. 959–974, doi:10.2475/ajs.290.8.959.
Karabinos, Paul, Samson, S.D., Hepburn, J.C., and Stoll, H.M., 1998, Taconian orogeny in the New England Appalachians; Collision between Laurentia and the Shelburne Falls arc: Geology, v. 26, no. 3, p. 215–218, doi:10.1130/0091–7613 (1998)026<0215:TOITNE>2.3.CO;2.
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SOURCES OF GEOLOGIC MAP DATA
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Albee, A.L., 1957, Bedrock geology of the Hyde Park quadrangle, Vermont: U.S. Geo-logical Survey Geologic Quadrangle Map GQ–102, scale 1:62,500.
Armstrong, T.R., 1993, Tectonic evolution of the Taconian hinterland, Granville-Hancock area, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 199 p.
Armstrong, T.R., and Ratcliffe, N.M., 1998, Digital and preliminary bedrock geologic map of the Townshend 7.5 × 15 minute quadrangle, Vermont: U.S. Geological Sur-vey Open-File Report 98–335–A, 1 sheet, scale 1:24,000; 98–335–B, digital data-base for part A, 3 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG98–335A and 335B at http://www.anr.state.vt.us/ dec/geo/digitofr.htm.)
Armstrong, T.R., 1994, Bedrock geology of the Moretown Formation, North River Ig-neous Suite and associated metasedimentary/metavolcanic rocks of the Connecticut Valley Belt, Brattleboro and Newfane [7.5 × 15 minute] quadrangles, Windham County, Vermont: U.S. Geological Survey Open-File Report 94–247, 26 p., 2 pls., scale 1:24,000.
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Armstrong, T.R., 2008, unpublished data.
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Cherichetti, L.C., 1995, Stratigraphy and structural geology of the Pinnacle Formation between the Lamoille and Winooski Rivers, northwestern Vermont: Vermont Geo-logical Survey Open-File Report VG95–1, 10 p., 3 pls., scale 1:24,000. (Also avail-able at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
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Condon, R., and Harding, L., 1996, unpublished data for the South Mountain 7.5-minute quadrangle, Vermont.
Cua, A.K., 1989, Geology and geochemistry of metabasaltic rocks from the Roxbury area, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 256 p.
DelloRusso, Vincent, and Stanley, R.S., 1986, Bedrock geology of the northern part of the Lincoln Massif, central Vermont: Vermont Geological Survey Special Bulletin 8, 56 p., 4 pls., scales 1:12,000 and 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.)
Dennis, J.G., 1964, The geology of the Enosburg area, Vermont: Vermont Geological Survey Bulletin 23, 56 p., 3 pls., scale 1:62,500.
DiPietro, J.A., 1983, Geology of the Starksboro area, Vermont: Vermont Geological Survey Special Bulletin 4, 14 p., 2 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.)
Doll, C.G., Cady, W.M., Thompson, J.B., Jr., and Billings, M.P., 1961, Centennial geo-logic map of Vermont: [Montpelier,] Vermont Geological Survey, scale 1:250,000. (Also available at http://www.anr.state.vt.us/dec/geo/centmap.htm.)
Doolan, Barry, 1995, Digital bedrock geologic map of the Gilson Mountain 7.5 minute quadrangle, Vermont: Vermont Geological Survey Open-File Report VG95–7A, 2 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.)
Doolan, Barry, comp., 1999, Compilation bedrock geologic map of the Jay Peak quad-rangle, Vermont: Vermont Geological Survey Open-File Report VG99–1, 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Doolan, B, Brooks, K., Copans, B., Hengstenberg, C., and Sonenberg, D., 1999, Bed-rock geology of the Cold Hollow Mountains quadrangle, Vermont: Vermont Geologi-cal Survey Open-File Report VG99–4, 6 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Doolan, Barry, Cherichetti, Lars, Holt, Jon, Ryan, Jeremy, Hengstenberg, Carey, and Rosencrantz, Eric, 2003, Bedrock geology of the Underhill quadrangle, Vermont: Vermont Geological Survey Open-File Report VG03–4B, scale 1:24,000. (Also avail-able at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Doolan, B.L., Hatch, N.L., Jr., Thompson, P.J., Gale, M.H., and Kim, Jonathan, 2002, unpublished data for the Mt. Mansfield 30 × 60 minute quadrangle, Vermont.
Dorsey, R.J., 1983, Geological synthesis of the Milton quadrangle, northwestern Ver-mont; A new interpretation: Burlington, Vt., University of Vermont, unpub. B.S. the-sis, 103 p.
Dorsey, R.J., Agnew, P.C., Carter, C.M., Rosencrantz, E.J., and Stanley, R.S., 1983, Bedrock geology of the Milton quadrangle, northwestern Vermont: Vermont Geologi-cal Survey Special Bulletin 3, 14 p., 4 pls., scales 1:24,000 and 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.)
Dorsey, Rebecca, Doolan, Barry, Agnew, Paul, Carter, Craig, Rosencrantz, Eric, and Stanley, Rolfe, 1995, Digital compilation bedrock geologic map of the Milton quad-rangle, Vermont: Vermont Geological Survey Open-File Report VG95–8A, 2 pls., scale 1:24,000; VG95–8B, database for part A. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Eiben, D.B., 1976, Stratigraphy and structure of the Stimson Mountain area, Camels Hump quadrangle, north central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 112 p.
Eric, J.H., and Dennis, J.G., 1958, Geology of the Concord-Waterford area, Vermont: Vermont Geological Survey Bulletin 11, 66 p., 2 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Erwin, R.B., 1957, The geology of the limestone of Isle La Motte and South Hero Is-land, Vermont: Vermont Geological Survey Bulletin 9, 94 p., 2 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Fisher, D.W., 1985, Bedrock geology of the Glens Falls-Whitehall region, New York: New York State Museum and Science Service, Map and Chart Series 35, 3 pls., scale 1:48,000, includes pamphlet, 58 p.
Fowler, Phillip, 1950, Stratigraphy and structure of the Castleton area, Vermont: Ver-mont Geological Survey Bulletin 2, 83 p., 2 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Frederick, Jeffrey, 1996, unpublished data for the Middlebury 7.5-minute quadrangle, Vermont.
Gale, M.H., 1980, Geology of the Belvidere Mountain Complex, Eden and Lowell, Ver-mont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 169 p.
Gale, M.H., 1986, Geologic map of the Belvidere Mountain area, Eden and Lowell, Ver-mont: U.S. Geological Survey Miscellaneous Investigations Series Map I–1560, scale 1:20,000. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_9315.htm.) (Supersedes USGS Open-File Report 80–978.)
Gale, M.H., and Kim, J., 1999, Compilation bedrock geologic map of the Hazens Notch quadrangle, Vermont: Vermont Geological Survey Open-File Report VG99–2, 2 pls., scale 1:24,000.
Gale, M.H., Kim, J., Earle, H., Clark, A., Smith, T., and Petersen, K., 2009, Bedrock geologic map of Charlotte, Vermont: Vermont Geological Survey Open-File Report VG09-5, 3 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.)
Gale, M.H., Kim, J., King, S., Montane, P., and Orsi, C., 2006, Bedrock geologic map of the southern Worcester Mountains watershed, Middlesex and Stowe 7.5 minute quadrangles, Vermont: Vermont Geological Survey Open-File Report VG2006–2, 3 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.)
Gale, P.N., 1980, Geology of the Newport Center area, north central Vermont: Burling-ton, Vt., University of Vermont, unpub. M.S. thesis, 126 p.
Gillespie, Richard, Stanley, Rolfe, Frank, Terry, and Barton, Thelma, 1972, Superposed folds and structural chronology along the southeastern part of the Hinesburg syn-clinorium, in New England Intercollegiate Geological Conference, 64th Annual Meet-ing, Burlington, Vermont, 1972, Guidebook for field trips in Vermont: p. 195–214. (Edited by B.L. Doolan and R.S. Stanley.)
Goldberg, J., and Mehrtens, C.J., 1994, Bedrock geology of the Port Henry and north-western portion of the Middlebury quadrangles: Vermont Geological Survey Open-File Report VG94–3, 21 p., 1 pl., scale 1:24,000.
Goodwin, B.K., 1963, Geology of the Island Pond area, Vermont: Vermont Geological Survey Bulletin 20, 111 p., 3 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Hadley, J.B., 1950, Geology of the Bradford-Thetford area, Orange County, Vermont: Vermont Geological Survey Bulletin 1, 36 p., 2 pls. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Hall, L.M., 1959, The geology of the St. Johnsbury quadrangle, Vermont and New Hampshire: Vermont Geological Survey Bulletin 13, 105 p., 5 pls., including geo-logic map, scale 1:62,500. (Also available at http://www.anr.state.vt.us/ dec/geo/bulletins.htm.)
Handy, J., 1975, unpublished data for the Burlington 7.5-minute quadrangle, Vermont.
Hatch, N.L., Jr., unpublished data for the eastern half of the Montpelier and Mt. Mans-field 30 × 60 minute quadrangles.
Hatch, N.L., Jr., 1985–1991, unpublished data.
Hatch, N.L., Jr., 1989, Reconnaissance bedrock geologic map of the South Royalton quadrangle, Vermont: U.S. Geological Survey Open-File Report 89–288, 8 p., 1 pl., scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/ proddesc_17623.htm, http://pubs.usgs.gov/of/1989/0288/plate-1.pdf, and http://pubs.usgs.gov/of/1989/0288/report.pdf.)
Hatch, N.L., Jr., 1990, Reconnaissance bedrock geologic map of the rocks northwest of the Monroe fault, Concord quadrangle, Vermont: U.S. Geological Survey Open-File Report 90–283, 11 p., 1 pl., scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_17899.htm and http://pubs.usgs.gov/ of/1990/0283/report.pdf.)
Hatch, N.L., Jr., 1991, Reconnaissance bedrock geologic map of the Randolph Center quadrangle, Vermont: U.S. Geological Survey Open-File Report 91–275, 8 p., 1 pl., scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/ proddesc_18102.htm, http://pubs.usgs.gov/of/1991/0275/report.pdf, and http://pubs.usgs.gov/of/1991/0275/report.pdf.)
Hatch, N.L., Jr., and Hartshorn, J.H., 1968, Geologic map of the Heath quadrangle, Massachusetts-Vermont: U.S. Geological Survey Geologic Quadrangle Map GQ–735, scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/ proddesc_2042.htm.)
Haydock, S.R., 1988, Tectonic geology of the Waitsfield-Warren area, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 209 p.
Haydock, S.R., and Walsh, G.J., 1996, Digital compilation bedrock geologic map of the western part of the Waitsfield quadrangle, Vermont: Vermont Geological Survey Open-File Report VG96–3A, 2 pls., scale 1:24,000; VG96–3B, database for part A. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Hayes, C.G., 1978, The geology of the Shushan quadrangle, New York-Vermont: Ithaca, N.Y., Cornell University, unpub. M.S. thesis, 58 p., 3 pls., scale 1:24,000.
Hepburn, J.C., Trask, N.J., Rosenfeld, J.L., and Thompson, J.B., Jr., 1984, Bedrock geology of the Brattleboro quadrangle, Vermont-New Hampshire: Vermont Geologi-cal Survey Bulletin 32, 162 p., 2 pls., including geologic map, scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Hewitt, P.C., and LaBrake, R.F., 1961, The geology of the Equinox quadrangle and vi-cinity, Vermont: Vermont Geological Survey Bulletin 18, 83 p., 6 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Hoar, R.S., 1981, The bedrock geology of the Coventry area, Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 139 p.
Johansson, W.I., 1963, Geology of the Lunenburg-Brunswick-Guildhall area, Vermont: Vermont Geological Survey Bulletin 22, 86 p., 3 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Kim, J., 1997, Bedrock geologic map of parts of the Eden, Albany, Lowell, and Irasburg quadrangles: Vermont Geological Survey Open-File Report VG97–5, 6 p., 2 pls., scale 1:24,000.
Kim, Jonathan, Gale, Marjorie, King, S.M., Orsi, C.M., and Pascale, L.R., 2003, Bed-rock geology of the Montpelier quadrangle, Vermont: Vermont Geological Survey Open-File Report VG03–1, 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Kim, Jonathan, Gale, Marjorie, Thompson, Peter, and Derman, Karen, 2007, Bedrock geologic map of the town of Williston, Vermont: Vermont Geological Survey Open-File Report VG07–4, 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Kim, Jonathan, Springston, George, and Gale, Marjorie, 1998, Digital bedrock geologic map of the Eden quadrangle, Vermont: Vermont Geological Survey Open-File Report VG98–3, 2 pls., scale 1:24,000; VG98–3B, database for VG98–3. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Kim, Jonathan, and Thompson, Peter, 2001, Bedrock geologic map of the Colchester quadrangle[, Vermont]: Vermont Geological Survey Open-File Report VG01–1, 3 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.)
Kimball Falta, Christine, 1991, Tectonic geology of the Rochester-Hancock area, Roch-ester quadrangle, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 248 p.
Kraus, J.F., 1989, Geology of the Northfield Mountains, central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 145 p.
Lapp, E.T., and Stanley, R.S., 1986, Bedrock geology of the Mt. Grant-South Lincoln area, central Vermont: Vermont Geological Survey Special Bulletin 7, 27 p., 3 pls., scale 1:12,000. (Also available at http://www.anr.state.vt.us/dec/geo/ specbulls.htm.)
Lyons, J.B., 1955, Geology of the Hanover quadrangle, New Hampshire-Vermont: Geological Society of America Bulletin v. 66, no. 1, p. 104–145, includes geologic map, scale 1:62,500, doi:0.1130/0016-7606(1955)66[105:GOTHQN]2.0.CO;2.
Lyons, J.B., 1958, Geology of the Hanover quadrangle[, New Hampshire-Vermont]: Concord, N.H., New Hampshire State Planning and Development Commission, 41 p., includes geologic map, scale 1:62,500.
Lyons, J.B., Bothner, W.A., Moench, R.H., and Thompson, J.B., Jr., 1997, Bedrock geologic map of New Hampshire: Reston, Va., U.S. Geological Survey, 2 sheets, scales 1:250,000 and 1:500,000.
Lyttle, P.T., 1995, Digital bedrock geologic map of the Arlington quadrangle and Ver-mont portion of the Shushan quadrangle, Vermont: U.S. Geological Survey Open-File Report 95–483–A, 2 pls., scale 1:24,000; 95–483–B, digital database for part A, 2 disks (3.5 inches). (Also available at http://pubs.usgs.gov/of/1995/0483a/.) (Also available as Vermont Geological Survey Open-File Reports VG95–483 and 483A at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Lyttle, P.T., unpublished data.
MacFadyen, J.A., Jr., 1956, The geology of the Bennington area, Vermont: Vermont Geological Survey Bulletin 7, 72 p., 3 pls., scale 1:62,500. (Plates also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Mallard, L.D., 2000, Stratigraphic structural, and fault history analyses of the Richmond 7.5' quadrangle, north-central Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 157 p.
Mango, Helen, 1997, Bedrock geologic map of the Orwell quadrangle[, Vermont]: Ver-mont Geological Survey Open-File Report VG97–6, 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Martin, D.C., 1993, unpublished data for the Roxbury 7.5-minute quadrangle, Vermont.
Martin, D.C., 1994, Geology of the Mississquoi Group and the Acadian orogeny in cen-tral Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 247 p., 8 pls.
Martin, D.C., Cua, A.C., and Stanley, R.S., 1995, Digital compilation bedrock geologic map of the Roxbury quadrangle and eastern part of the Warren quadrangle, Vermont: Vermont Geological Survey Open-File Report VG95–2A, 2 pls., scale 1:24,000; VG95–2B, database for part A.
Mehrtens, C.J., 1996a, unpublished data for the Burlington 7.5-minute quadrangle, Vermont.
Mehrtens, C.J., 1996b, unpublished data for the Monkton Boro 7.5-minute quadrangle, Vermont.
Mehrtens, C.J., 1996c, unpublished data for the Mount Philo 7.5-minute quadrangle, Vermont.
Mehrtens, C.J., 1996d, Digital compilation bedrock geologic map of the Lake Cham-plain North one-degree sheet, Vermont: Vermont Geological Survey Open-File Re-port VG96–02A, 2 pls., scale 1:100,000; VG96–02B, database for part A. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Mehrtens, C.J., 1997, Digital compilation bedrock geologic map of the Lake Champlain South one-degree sheet, Vermont: Vermont Geological Survey Open-File Report VG97–01A, 2 pls., scale 1:100,000; VG97–01B, database for part A. (Also avail-able at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Mehrtens, C.J., and Borre, M.A., 1989, Stratigraphy and bedrock geology of parts of the Colchester and Georgia Plains quadrangles, northwestern Vermont: Vermont Geological Survey Special Bulletin 11, 29 p., 2 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.)
Mehrtens, C.J., and Dorsey, R.J., 1987, Stratigraphy and bedrock geology of the north-western portion of the St. Albans quadrangle and the adjacent Highgate Center quad-rangle, Vermont: Vermont Geological Survey Special Bulletin 9, 28 p., 3 pls., scales 1:12,000 and 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ specbulls.htm.)
Mehrtens, C.J., and Hadley, A.C.H., 1995, Bedrock geology of parts of the St. Albans and Georgia 7.5' quadrangles[, northwestern Vermont]: Vermont Geological Survey Special Bulletin 14, 18 p., 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.)
Mehrtens, C.J., Doolan, B.L., Gale, M.H., Stanley, R.S., and Thompson, P.J., 2000, unpublished data for the Lake Champlain North 30 × 60 minute quadrangle.
Mehrtens, C.J., Stanley, R.S., Gale, M.H., and Thompson, P.J., 2000, unpublished data for the Lake Champlain South 30 × 60 minute quadrangle.
Metz, R., 1980, Geologic map of the Cambridge quadrangle, New York: New York State Geological Survey, Open-File Map 1g 081, scale 1:24,000.
Mock, T.D., 1989, Bedrock geology of the East Fletcher-Bakersfield area, northern Ver-mont: Vermont Geological Survey Special Bulletin 10, 28 p., 3 pls., scale 1:12,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.)
Moench, R.H., 1990, The Piermont allochthon, northern Connecticut Valley area, New England—Preliminary description and resource implications, chap. J of Slack, J.F., ed., Summary results of the Glens Falls CUSMAP Project, New York, Vermont, and New Hampshire: U.S. Geological Survey Bulletin 1887, p. J1–J23. (Also available at http://pubs.usgs.gov/bul/1887/.)
Moench, R.H., 2001, unpublished data for the Barnet and Woodsville 7.5-minute quad-rangles, Vermont.
Moench, R.H., Boone, G.M., Bothner, W.A., Boudette, E.L., Hatch, N.L., Jr., Hussey, A.M., II, and Marvinney, R.G., 1995, Geologic map of the Sherbrooke-Lewiston area, Maine, New Hampshire, and Vermont, United States, and Québec, Canada, with Contributions to geochronology by J.N. Aleinikoff: U.S. Geological Survey Mis-cellaneous Investigations Series Map I–1898–D, 2 sheets, scale 1:250,000, includes pamphlet, 56 p.
Myers, P.B., Jr., 1964, Geology of the Vermont portion of the Averill quadrangle, Ver-mont: Vermont Geological Survey Bulletin 27, 69 p., 2 pls., including geologic map, scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/ bulletins.htm.)
O’Loughlin, S.B., and Stanley, R.S., 1986, Bedrock geology of the Mount Abraham-Lincoln Gap area, central Vermont: Vermont Geological Survey Special Bulletin 6, 29 p., 3 pls., scale 1:12,000. (Also available at http://www.anr.state.vt.us/ dec/geo/specbulls.htm.)
Osberg, P.H., 1959, The stratigraphy and structure of the Coxe Mountain area, Ver-mont, trip F in New England Intercollegiate Geological Conference, 51st Annual Meeting, Rutland, Vermont, 1959: p. 45–52. (Edited by E-an Zen.)
Platt, L.B., 1960, Structure and stratigraphy of the Cossayuna area New York: New Haven, Conn., Yale University, unpub. Ph.D. thesis, 126 p., 6 pls., scale 1:24,000.
Potter, D.B., 1972, Stratigraphy and structure of the Hoosick Falls area, New York-Vermont, east-central Taconics: New York State Museum and Science Service, Map and Chart Series 19, 71 p., includes geologic map, scale 1:24,000.
Prahl, C., 1985, The geology of the Middle Proterozoic rocks of the Lincoln massif of west-central Vermont and their suitability for long term storage of high level nuclear waste: Burlington, Vt., University of Vermont, unpub. B.S. thesis, 42 p.
Prewitt, J.M., 1989, Bedrock geology of the Warren-Granville Gulf area, central Ver-mont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 137 p.
Rankin, D.W., 1994, Preliminary bedrock geologic map of parts of the Lower Water-ford, Concord, Littleton, and Miles Pond 7 1/2-minute quadrangles, Vermont and New Hampshire: U.S. Geological Survey Open-File Report OF–94–410, 28 p., 3 pls., scale 1:24,000. (Text also available at http://pubs.usgs.gov/of/ 1994/0410/report.pdf.)
Rankin, D.W., 1996, Bedrock geology of the Littleton, Vermont-New Hampshire 15-minute quadrangle northwest of the Ammonoosuc fault, with a section on The ana-lytical methods and isotopic age investigation of pegmatitic metadiorite of the intru-sive suite of Comerford Dam, by Robert D. Tucker, in New England Intercollegiate Geological Conference, 88th Annual Meeting, Mount Washington, N.H., September 27, 28, and 29, 1996, Guidebook to field trips in northern New Hampshire and adja-cent regions of Maine and Vermont: Cambridge, Mass., Harvard University, p. 5–37. (Edited by M.R. Van Baalen.)
Rankin, D.W., 1997, unpublished data for the Mt. Washington and Montpelier 30 × 60 minute quadrangles.
Rankin, D.W., 2008, unpublished data.
Rankin, D.W., and Tucker, R.D., 2007, The Piermont allochthon revisited and redefined at its type locality—Discussion: Geological Society of America Bulletin, v. 119, nos. 3–4, p. 500–502, doi:10.1130/B26089.
Ratcliffe, N.M., 1992, Preliminary bedrock geologic map of the Mount Holly quad-rangle, and portions of the Ludlow quadrangle, Rutland and Windsor Counties, Ver-mont: U.S. Geological Survey Open-File Report 92–282–A, 16 p., 2 pls., scale 1:24,000.; 92–282–B, 5 slides. (Part A is also available at http://pubs.usgs.gov/ of/1992/0282a/.)
Ratcliffe, N.M., 1993, Bedrock geologic map of the Mount Snow and Readsboro quad-rangles, Bennington and Windham Counties, Vermont: U.S. Geological Survey Mis-cellaneous Investigations Series Map I–2307, 1 sheet, scale 1:24,000, includes pam-phlet, 9 p. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_ 10234.htm.) (See also digital data in Ratcliffe, 1995c, Vermont Geological Survey Open-File Report VG95–DM1.)
Ratcliffe, N.M., 1994, [Note] 2. The Wilcox Formation of Vermont assigned to the Mount Holly Complex, in Stratigraphic notes, 1992: U.S. Geological Survey Bulletin 2060, p. 11–18, 1 pl., scale 1:48,000. (Also available at http://pubs.usgs.gov/ bul/2060/.)
Ratcliffe, N.M., 1995a, Digital bedrock geologic map of the Cavendish quadrangle, Ver-mont: U.S. Geological Survey Open-File Report 95–203–A, 2 pls., scale 1:24,000; 95–203–B, digital database for part A, 2 disks (3.5 inches). (Part A is also available at http://pubs.usgs.gov/of/1995/0203a/.)
Ratcliffe, N.M., 1995b, Digital bedrock geologic map of the Chester quadrangle, Ver-mont: U.S. Geological Survey Open-File Report 95–576–A, 2 pls., scale 1:24,000; 95–576–B, digital database for part A, 2 disks (3.5 inches).
Ratcliffe, N.M., 1995c, Digital bedrock geologic map of the Mount Snow and Reads-boro quadrangles, Vermont: Vermont Geological Survey Open-File Report VG95–DM1, 1 diskette, scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.) (Supplements Ratcliffe, 1993, U.S. Geological Survey Miscellaneous Investigations Series Map I–2307.)
Ratcliffe, N.M., 1996, Digital bedrock geologic map of the Andover quadrangle, Ver-mont: U.S. Geological Survey Open-File Report 96–31–A, 2 pls., scale 1:24,000; 96–31–B, digital database for part A. (Part A is also available at http://pubs.usgs.gov/of/1996/0031a/.) (Report is also available as Vermont Geo-logical Survey Open-File Reports VG96–31A and 31B; both parts are at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Ratcliffe, N.M., 1997a, Bedrock geologic map of the Jamaica and part of the Towns-hend quadrangles, Windham and Bennington Counties, Vermont: U.S. Geological Survey Miscellaneous Investigations Series Map I–2453, 2 pls., scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_13037.htm.)
Ratcliffe, N.M., 1997b, Digital and preliminary bedrock geologic map of the Chittenden quadrangle, Vermont: U.S. Geological Survey Open-File Report 97–854–A, 1 pl., scale 1:24,000; 97–854–B, digital database for part A, 2 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG97–854A and 854B at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Ratcliffe, N.M., 1997c, Preliminary bedrock geologic map of the Chittenden quad-rangle, Rutland County, Vermont: U.S. Geological Survey Open-File Report 97–703, 36 p., 3 pls., scale 1:24,000. (Also available at http://pubs.usgs.gov/ of/1997/0703/.)
Ratcliffe, N.M., 1998, Digital and preliminary bedrock geologic map of the Rutland quadrangle, Vermont: U.S. Geological Survey Open-File Report 98–121–A, 1 pl., scale 1:24,000; 98–121–B, digital database for part A, 2 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG98–121A and 121B at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Ratcliffe, N.M., 2000a, Bedrock geologic map of the Cavendish quadrangle, Windsor County, Vermont: U.S. Geological Survey Geologic Quadrangle Map GQ–1773, 1 pl., scale 1:24,000, includes pamphlet, 19 p. (Also available at http://ngmdb.usgs.gov/ Prodesc/proddesc_33543.htm.)
Ratcliffe, N.M., 2000b, Bedrock geologic map of the Chester quadrangle, Windsor County, Vermont: U.S. Geological Survey Geologic Investigations Series Map I–2598, 1 pl., scale 1:24,000, includes pamphlet, 16 p. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_33542.htm.)
Ratcliffe, N.M., 1990–2008, unpublished data.
Ratcliffe, N.M., and Armstrong, T.R., 1996, Digital bedrock geologic map of the Sax-tons River 7.5 × 15 minute quadrangle, Vermont: U.S. Geological Survey Open-File Report 96–52–A, 2 pls., scale 1:24,000; 96–52–B, digital database for part A, 4 disks (3.5 inches). (Part A is also available at http://pubs.usgs.gov/of/ 1996/0052a/.) (Also available as Vermont Geological Survey Open-File Reports VG96–52A and 52B at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Ratcliffe, N.M., and Armstrong, T.R., 1999, Bedrock geologic map of the West Dover and Jacksonville quadrangles, Windham County, Vermont: U.S. Geological Survey Miscellaneous Investigations Series Map I–2552, 2 pls., scale 1:24,000, includes pamphlet, 30 p. (Also available at http://pubs.usgs.gov/imap/2552/ and http://ngmdb.usgs.gov/Prodesc/proddesc_22689.htm.)
Ratcliffe, N.M., and Armstrong, T.R., 2001, Bedrock geologic map of the Saxtons River 7.5' × 15' quadrangle, Windham and Windsor Counties, Vermont: U.S. Geological Survey Geologic Investigations Series Map I–2636, 2 sheets, scale 1:24,000, includes pamphlet, 21 p. (Also available at http://ngmdb.usgs.gov/Prodesc/ proddesc_42276.htm and http://pubs.usgs.gov/imap/2636/.)
Ratcliffe, N.M., and Burton, W.C., 1989, Preliminary bedrock map of the Stratton Mountain quadrangle, Vermont: U.S. Geological Survey Open-File Report 89–200, 1 pl., scale 1:24,000, includes pamphlet, 11 p. (Also available at http://pubs.usgs.gov/of/1989/0200/ and http://ngmdb.usgs.gov/Prodesc/ proddesc_18947.htm.)
Ratcliffe, N.M., and Burton, W.C., 1996, Digital bedrock geologic map of the Weston quadrangle, Vermont: U.S. Geological Survey Open-File Report 96–526–A, 2 pls., scale 1:24,000; 96–526–B, digital database for part A, 2 disks (3.5 inches). (Part A is available at http://pubs.usgs.gov/of/1996/0526a/.) (Also available as Vermont Geological Survey Open-File Reports VG96–526A and 526B at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Ratcliffe, N.M., Potter, D.B., and Stanley, R.S., 1993, Bedrock geologic map of the Wil-liamstown and North Adams quadrangles, Massachusetts and Vermont, and part of the Cheshire quadrangle, Massachusetts: U.S. Geological Survey Miscellaneous Inves-tigations Series Map I–2369, scale 1:24,000. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_10257.htm.)
Ratcliffe, N.M., and Walsh, G.J., 1998, Digital and preliminary bedrock geologic map of the Mount Carmel quadrangle, Vermont: U.S. Geological Survey Open-File Report 98–330–A, 1 pl., scale 1:24,000; 98–330–B, digital database for part A, 3 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG98-330A and 330B at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Rathke, W.W., 1978, Structural relations of Taconic slices, southern Berlin Valley, New York: Ithaca, N.Y., Cornell University, unpub. M.S. thesis, 59 p., 2 pls., scale 1:24,000.
Rosencrantz, E., Schoonmaker, A., Copans, B., Holt, J., Ryan, J., Talcott, J., and Sonenberg, D., 1998, Bedrock geology of the Richford quadrangle, Franklin County, Vermont: Vermont Geological Survey Open-File Report VG98–4, 45 p., 6 pls., scale 1:24,000.
Roy, D.L., 1982, The structure and stratigraphy of the Cambrian-Ordovician sequence in the ultramafic belt near Troy, Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 123 p.
Schoonmaker, Adam, 1997, Stratigraphy and structure of the Enosburg Falls area; Impli-cations for extending geotectonic structures of Québec into Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 206 p.
Schoonmaker, Adam, 1998, Bedrock geology of the western 1/3 of the Hazens Notch 7.5 minute quadrangle, northern Vermont: Vermont Geological Survey Open-File Re-port VG98–6, 2 pls., scale 1:24,000.
Schoonmaker, Adam, 2005, Convergent and collisional tectonics in parts of Oregon, Maine, and the Vermont-Québec border: Albany, N.Y., State University of New York at Albany, unpub. Ph.D. dissertation, 218 p.
Schoonmaker, Adam, and Kidd, W.S.F., 2007, A reappraisal of the allochthonous nature of the Rosenberg slice and the Stanbridge Group of southern Québec and northwest-ern Vermont: Canadian Journal of Earth Sciences, v. 44, no. 2, p. 155–169, doi:10.1139/e06-079.
Segerstrom, Kenneth, 1956, Bedrock geology of the Colrain quadrangle, Massachu-setts-Vermont: U.S. Geological Survey Geologic Quadrangle Map GQ–86, scale 1:31,680. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_1017.htm.)
Shumaker, R.C., and Thompson, J.B., Jr., 1967, Bedrock geology of the Pawlet quad-rangle, Vermont: Vermont Geological Survey Bulletin 30, 98 p., 2 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Springston, George, 1997, Bedrock geology of the Stowe-Waterbury area, north-central Vermont: Vermont Geological Survey Open-File Report VG97–4, 23 p., 4 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ ofreps.htm.)
Springston, George, Kim, Jonathan, and Applegate, Scot, 1998, Digital bedrock geo-logic map of the Morrisville quadrangle, Vermont: Vermont Geological Survey Open-File Report VG98–1, 2 pls., scale 1:24,000; VG98–1b, database for VG98–1. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Stanley, R.S., 1969, Bedrock geology of the southern portion of the Hinesburg synclino-rium, trip C in New York State Geological Association, 41st Annual Meeting, Platts-burgh, New York, May 1969, Guidebook to field excursions: p. 37–64. (Edited by S.G. Barnett.) (Also available at http://www.nysga.net/files/32068470.pdf.)
Stanley, R.S., DelloRusso, V., Haydock, S., Lapp, E., O’Loughlin, S., Prewitt, J., and Tauvers, P.R., 1995, Digital compilation bedrock geologic map of the Lincoln quad-rangle, Vermont: Vermont Geological Survey Open-File Report VG95–5A, 2 pls., scale 1:24,000; VG95–5B, database for part A. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Stanley, R.S., DelloRusso, V., Tauvers, P.R., DiPietro, J.A., Taylor, S., and Prahl, C., 1995, Digital compilation bedrock geologic map of the South Mountain quadrangle, Vermont: Vermont Geological Survey Open-File Report VG95–3A, 2 pls., scale 1:24,000; VG95–3B, database for part A. (Also available at http://www.anr. state.vt.us/dec/geo/ofreps.htm.)
Stanley, R.S., Hatch, N.L., Jr., Thompson, P.J., Gale, M.H., and Walsh, G.J., 2002, un-published data for the Montpelier 30 × 60 minute quadrangle.
Stanley, R.S., and Roy, D., 1997, Digital bedrock geologic map of part of the Serpen-tine belt, Lowell and North Troy quadrangles, Vermont: Vermont Geological Survey Open-File Report VG97–04A, 2 pls., scale 1:24,000; VG97–04B, database for part A; VG97–04C, bedrock geologic map of the Jay and North Troy area, Vermont, 10 pls., supersedes part A. (Also available at http://www.anr.state.vt.us/dec/geo/ ofreps.htm.)
Stanley, R.S., Roy, D.L., Hatch, N.L., Jr., and Knapp, D.A., 1984, Evidence for tectonic emplacement of ultramafic and associated rocks in the pre-Silurian eugeoclinal belt of western New England; Vestiges of an ancient accretionary wedge: American Journal of Science, v. 284, nos. 4–5, p. 559–595, doi:10.2475/ajs.284.4-5.559.
Stanley, Rolfe, and Sarkesian, Arthur, 1972, Analysis and chronology of structures along the Champlain thrust west of the Hinesburg synclinorium, in New England Intercolle-giate Geological Conference, 64th Annual Meeting, Burlington, Vermont, 1972, Guidebook for field trips in Vermont: p. 117–149. (Edited by B.L. Doolan and R.S. Stanley.)
Stanley, R.S., Walsh, G.J., Tauvers, P.R., DiPietro, J.A., and DelloRusso, V., 1995, Digital compilation bedrock geologic map of the Mt. Ellen quadrangle, Vermont: Ver-mont Geological Survey Open-File Report VG95–6A, 2 pls., scale 1:24,000; VG95–6B, database for part A. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.)
Steuer, M.R., 1982, Structural geology of the Salem area, New York: Bryn Mawr, Pa., Bryn Mawr College, unpub. Ph.D. thesis, 94 p., 3 pls., scale 1:24,000.
Tauvers, P.R., 1982, Bedrock geology of the Lincoln area, Vermont: Vermont Geologi-cal Survey Special Bulletin 2, 8 p., 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.)
Theokritoff, George, 1984, Taconic stratigraphy in northern Washington County, New York: Geological Society of America Bulletin, v. 73, no. 3, p. 171–190.
Thompson, P.J., 1975, Stratigraphy and structure of Shattuck Ridge, Bakersfield and
Waterville, Vermont: Burlington, Vt., University of Vermont, unpub. M.S. thesis, 68 p.
Thompson, P.J., 2006, Bedrock geologic map of Woodstock, Vermont: Vermont Geo-logical Survey Open-File Report VG06–4, 4 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Thompson, P.J., 2008, unpublished data.
Thompson, P.J., and Thompson, T.B., 1992, Bedrock geology of the Camels Hump-Bolton Mountain area, north-central Vermont: Vermont Geological Survey Special Bulletin 12, 32 p., 4 pls., scale 1:24,000. (Also available at http://www.anr. state.vt.us/dec/geo/specbulls.htm.)
Thompson, P.J., and Thompson, T.B., 1995, Digital bedrock geologic map of parts of the Huntington, Richmond, Bolton and Waterbury quadrangles, Vermont: Vermont Geological Survey Open-File Report VG95–9A, 2 pls., scale 1:24,000; VG95–9B, database for part A. (Also available at http://www.anr.state.vt.us/dec/geo/ ofreps.htm.)
Thompson, P.J., and Thompson, T.B., 1997, unpublished data for the Mt. Mansfield, Jeffersonville, and Bolton Mountain 7.5-minute quadrangles, Vermont.
Thompson, P.J., and Thompson, T.B., 1998, Digital bedrock geologic map of the John-son quadrangle, Vermont: Vermont Geological Survey Open-File Report VG98–2, 2 pls., scale 1:24,000; VG98–2b, database for VG98–2. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Thompson, P.J., and Thompson, T.B., 1999, Digital bedrock geologic map of the Mt. Mansfield quadrangle, Vermont: Vermont Geological Survey Open-File Report VG99–3, 3 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.)
Thompson, T.B., Thompson, Peter, and Doolan, Barry, 2004, Bedrock geologic map of the Hinesburg quadrangle, Vermont: Vermont Geological Survey Open-File Re-port VG04–2, 2 pls., scale 1:24,000, and geodatabase. (Also available at http://www.anr. state.vt.us/dec/geo/ofreps.htm.)
Timms, N.E., 2004, The Piermont allochthon revisited and redefined at its type locality: Geological Society of America Bulletin, v. 116, nos. 11–12, p. 1392–1407, doi:10.1130/B25365.1.
Traverse, Alfred, 1955, Pollen analysis of the Brandon Lignite of Vermont: U.S. Bureau of Mines Report of Investigations 5151, 107 p. (Also available at http://catalog.hathitrust.org/Record/005980348.)
Voight, Barry, 1965, The Sudbury nappe; Analysis of a parautochthon, unpub. manu-script, 56 p., 3 maps, variable scale. Written communication to N.M. Ratcliffe, 2002.
Walsh, G.J., 1992, Bedrock geology of the Fayston-Buels Gore area, central Vermont: Vermont Geological Survey Special Bulletin 13, 74 p., 4 pls., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/specbulls.htm.)
Walsh, G.J., 1998, Digital bedrock geologic map of the Vermont part of the Hartland quadrangle, Windsor County, Vermont: U.S. Geological Survey Open-File Report 98–123–A, 1 pl., scale 1:24,000, includes pamphlet, 17 p.; 98–123–B, digital data-base for part A, 2 disks (3.5 inches). (Pamphlet also available at http://pubs.usgs.gov/of/1998/0123a/.) (Also available as Vermont Geological Sur-vey Open-File Reports 98–123A and 123B at http://www.anr.state.vt.us/ dec/geo/ofreps.htm.)
Walsh, G.J., 2008, unpublished data.
Walsh, G.J., Armstrong, T.R., and Ratcliffe, N.M., 1996a, Digital bedrock geologic map of the Vermont part of the 7.5 × 15 minute Mount Ascutney and Springfield quad-rangles, Vermont: U.S. Geological Survey Open-File Report 96–733–A, 2 sheets, scale 1:24,000; 96–733–B, digital database for part A, 3 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG96–733A and 733B at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Walsh, G.J., Armstrong, T.R., and Ratcliffe, N.M., 1996b, Preliminary bedrock geologic map of the Vermont part of the 7.5' × 15' Mount Ascutney and Springfield quad-rangles, Windsor County, Vermont: U.S. Geological Survey Open-File Report 96–719, 4 pls., scale 1:24,000, includes pamphlet, 36 p. (Pamphlet also available at http://pubs.usgs.gov/of/1996/719/.)
Walsh, G.J., and Falta, C.K., 1996, Digital bedrock geologic map of the Rochester quadrangle, Vermont: U.S. Geological Survey Open-File Report 96–33–A, 2 sheets, scale 1:24,000; 96–33–B, digital database for part A, 2 disks (3.5 inches). (Superseded by Walsh and Falta, 2001, map I–2626.)
Walsh, G.J., and Falta, C.K., 2001, Bedrock geologic map of the Rochester quadrangle, Rutland, Windsor, and Addison Counties, Vermont: U.S. Geological Survey Geologic Investigations Series Map I–2626, 1 sheet, scale 1:24,000, includes pamphlet, 14 p. (Also available at http://ngmdb.usgs.gov/Prodesc/proddesc_43379.htm; pamphlet also available at http://pubs.usgs.gov/imap/2626/report.pdf.)
Walsh, G.J., Haydock, S., Prewitt, J., Kraus, J., Lapp, E., O’Loughlin, S., and Stanley, R.S., 1995, Digital compilation bedrock geologic map of the Warren quadrangle, Vermont: Vermont Geological Survey Open-File Report VG95–4A, 2 pls., scale 1:24,000; VG95–4B, database for part A. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
Walsh, G.J., Kim, Jonathan, Gale, M.H., and King, S.M., 2010, Bedrock geologic map of the Montpelier and Barre West quadrangles, Washington and Orange Counties, Vermont: U.S. Geological Survey Scientific Investigations Map 3111, 1 pl., scale 1:24,000, includes pamphlet, 36 p. (Also available at http://pubs.usgs.gov/ sim/3111/.)
Walsh, G.J., and Ratcliffe, N.M., 1994a, Digital bedrock geologic map of the Plymouth quadrangle, Vermont: U.S. Geological Survey Open-File Report 94–654–A, 2 sheets, scale 1:24,000; 94–654–B, digital database for part A, 2 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG94–654A and 654B at http://www.anr.state.vt.us/dec/geo/digitofr.htm.)
Walsh, G.J., and Ratcliffe, N.M., 1994b, Preliminary bedrock geologic map of the Plym-outh quadrangle and eastern portion of the Killington Peak quadrangle, Windsor and Rutland Counties, Vermont: U.S. Geological Survey Open-File Report 94–225–A, 36 p., 1 sheet, scale 1:24,000; 94–225–B, 6 colored slides.
Walsh, G.J., and Ratcliffe, N.M., 1998, Digital and preliminary bedrock geologic map of the Pico Peak quadrangle, Vermont: U.S. Geological Survey Open-File Report 98–226–A, 1 sheet, scale 1:24,000; 98–226–B, digital database for part A, 3 disks (3.5 inches). (Also available at http://www.anr.state.vt.us/dec/geo/digitofr.htm.)
Walsh, G.J., Ratcliffe, N.M., Dudley, J.B., and Merrifield, Thomas, 1994, Digital bed-rock geologic map of the Mount Holly and Ludlow quadrangles, Vermont, and expla-nation of the bedrock geology database in the Vermont Geographic Information Sys-tem, 1994: U.S. Geological Survey Open-File Report 94–229–A, 3 sheets, scale 1:24,000; 94–229–B, digital database for part A, 2 disks (3.5 inches). (Also available as Vermont Geological Survey Open-File Reports VG94–229A and 229B at http://www.anr.state.vt.us/dec/geo/digitofr.htm.) (Superseded in 1997 by a revised edition having the same USGS report number.)
Warren, M.J., 1990, Rift history and subsequent collisional behavior of the North Amer-ican Iapetus margin, Lincoln massif, central Vermont; An open and shut case: Burl-ington, Vt., University of Vermont, unpub. M.S. thesis, 235 p.
Welby, C.W., 1961, Bedrock geology of the central Champlain Valley of Vermont: Ver-mont Geological Survey Bulletin 14, 296 p., 5 pls., scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Westerman, David, 1994, Bedrock geologic map of the Northfield 7.5 minute quad-rangle, Vermont: Vermont Geological Survey Open-File Report VG94–4, 1 pl., scale 1:24,000. (Also available at http://www.anr.state.vt.us/dec/geo/ofreps.htm.)
White, W.S., and Billings, M.P., 1951, Geology of the Woodsville quadrangle, Vermont-New Hampshire: Geological Society of America Bulletin, v. 62, no. 6, p. 647–696, 3 pls., including geologic map, scale 1:62,500, doi:10.1130/0016-7606(1951)62[647:GOTWQV]2.0.CO;2.
Woodland, B.G., 1965, The geology of the Burke quadrangle, Vermont: Vermont Geo-logical Survey Bulletin 28, 151 p., 5 pls., including geologic map, scale 1:62,500. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Zen, E-an, 1959, unpublished data on the Taconic sequence and Lake Champlain, west-central Vermont.
Zen, E-an, 1961, Stratigraphy and structure at the north end of the Taconic Range in west-central Vermont: Geological Society of America Bulletin, v. 72, no. 2, p. 293–338, includes geologic map, scale 1:48,000, doi:10.1130/00167606(1961) 72[293:SASATN]2.0.CO;2.
Zen, E-an, 1964, Stratigraphy and structure of a portion of the Castleton quadrangle, Vermont: Vermont Geological Survey Bulletin 25, 70 p., 2 pls., scale 1:48,000. (Also available at http://www.anr.state.vt.us/dec/geo/bulletins.htm.)
Zen, E-an, ed., Goldsmith, Richard, Ratcliffe, N.M., Robinson, Peter, and Stanley, R.S., compilers, 1983, Bedrock geologic map of Massachusetts: Reston, Va., U.S. Geo-logical Survey, 3 sheets, scale 1:250,000. (Also available at http://ngmdb.usgs.gov/ Prodesc/proddesc_16357.htm.)
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DoolanGale
MehrtensStanley
Thompson
GaleMehrtensStanley
Thompson
DoolanGaleHatchKim
Thompson
GaleHatchRankinStanley
ThompsonWalsh
RankinRatcliffe
RankinRatcliffe
RatcliffeWalsh
RankinRatcliffeWalsh
Ratcliffe
Ratcliffe
Ratcliffe
Ratcliffe
LAKECHAMPLAIN
NORTH
LAKECHAMPLAIN
SOUTH
MOUNT MANSFIELD
MONTPELIER
MOUNT WASHINGTON
GROVETON
CLAREMONT
RUTLAND
ALBANY
GLENS FALLS
TICONDEROGA
KEENE
Sample Map Unit Map Sheet Description Age Reference (see References Cited for this table)
Table 1.—Summary of uranium-lead (U-Pb) zircon ages of rocks from Vermont. [Sample numbers are shown on the map and on the geologic structure map]
Hornblende diorite gneiss at South LondonderryBaileys Mills tonalitic gneiss in the Chester domeRawsonville trondhjemite gneiss at Bromley MountainFelchville Gneiss (aplitic facies) at Cavendish GorgeFelchville Gneiss (trondhjemite facies) at FelchvilleAplite facies of Rawsonville trondhjemitic gneiss, previously assigned to Bondville trondhjemitic gneiss Bondville metadacite at Winhall River bridgeCole Pond tonalite gneissMigmatitic gneiss at Stratton MountainFine-grained granodiorite at Ludlow MountainOkemo Quartzite; detrital zirconsCollege Hill Granite Gneiss; crosscuts older and deformed intrusives and paragneissGranitic gneiss crosscutting older and deformed intrusives (1.3–1.4-Ga suite) and paragneissMegacrystic granite gneiss at Brandon GapMegacrystic granite gneiss east of Chittenden ReservoirMegacrystic granite gneiss on the eastern side of the Green Mountain massifMigmatite gneiss in the Pine Hill sliceBull Hill Gneiss (of Richardson, 1931) in the Chester domeBull Hill Gneiss (of Richardson, 1931) on the west side of the Athens domeSomerset Reservoir GraniteStamford Granite near the Massachusetts borderRhyolitic metafelsite in the Pinney Hollow FormationNewfane tonalite intruding the Cram Hill Formation near South NewfaneTrondhjemite in the Barnard Gneiss proper (of Richardson, 1924) north of ProctorsvilleTonalite gneiss in the North River Igneous Suite near BartonsvilleFelsic volcanic layer interlayered with mafic volcanics in the Cram Hill Formation at SpringfieldTrondhjemite in the Barnard Gneiss proper (of Richardson, 1924) south of BethelJoslin Turn plutonHighlandcroft plutonLost Nation graniteLost Nation graniteLost Nation granite; U-Pb sphene ageFelsic rock in the Waits River FormationComerford Intrusive Complex at Comerford quarryComerford Intrusive Complex at Leighton HillComerford Intrusive Complex dike at Peaked MountainDiorite in the Braintree Intrusive ComplexUnmapped felsic dike of Sbg in Onbm near BridgewaterGranite in the Braintree Intrusive ComplexTrondhjemite of the Newport Intrusive ComplexMetarhyolite dike in the Albee FormationMetarhyolite dike in the Albee FormationFairlee Quartz MonzoniteBethlehem Gneiss in the pluton at Bellows FallsMetarhyolite in the Littleton FormationRhyolite in felsic metavolcanic member of the Gile Mountain FormationGranite in the Chester domeBarre GraniteBlack Mountain plutonGranite dike south of PlymouthFrench Pond GraniteVolcanic zircons in quartzite in the Gile Mountain Formation at Royalton
123456
6B789
101112131415161718192021222324252627282930313233343536373839404142434445464748495051
Y1dgY1bmY1rt
Y1fgaY1fgY1rtaY2bvY2cp
Y2migY2lggY2lqY2chY2gg
Y3AmbY3AmaY3AmaY3Bp
Y3CcbbhY3CcbbhY3CcbsrY3Ccbs�ZphfOnntOnbOnt
OchvOnbOj
OhiOlOlOl
DSwfScmScmScmSbd
OnbmSbgSndDrDr
DfqmDbgn
DlrDgmr
DgDbbgDbmg
DgDfpgDgr
SouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthSouthNorthNorthNorthNorthNorthSouthNorthNorthNorthNorthSouthNorthNorthNorthNorthNorthSouthNorthNorthSouthNorthSouthSouthNorthSouth
1,393 ± 9 Ma1,383 ± 13 Ma1,367 ± 16 Ma1,372 ± 11 Ma1,370 ± 11 Ma1,348 ± 3 Ma1,342 Ma1,321 ± 9 Ma1,326 ± 4 Ma1,309 ± 6 Ma~1,261 to 1,359 Ma1,244 ± 8 Ma1,221 ± 4 Ma1,149 ± 8 Ma1,121 ± 1.4 Ma1,119 ± 3.3 Ma1,037 ± 6 Ma945 ± 7 Ma955 ± 5 Ma965 ± 4 Ma962 ± 1 Ma571 ± 5 Ma502 ± 4 Ma496 ± 8 Ma486 ± 3 Ma483 ± 3 Ma471.4 ± 3.7 Ma469 ± 1.5 Ma450 ± 5 Ma444.1 ± 2.1 Ma442 ± 4 Ma443 ± 3 Ma423 ± 4 Ma419.8 ± 2.6 Ma419.3 ± 1.3 Ma418.5 ± 2 Ma419 ± 0.39 Ma418 ± 1 Ma421 ± 7 Ma425 ± 3 Ma414 ± 4 Ma412 ± 2 Ma410 ± 5 Ma407 ± 5 Ma407.5 ± 3.9 Ma407.0 ± 3.3 Ma392 ± 6 Ma368 ± 4 Ma364 ± 4 Ma365 ± 5 Ma365 ± 5 Ma409 ± 5 Ma
Aleinikoff and others (2011)Aleinikoff and others (2011)Ratcliffe and others (1991); Aleinikoff and others (2011)Aleinikoff and others (2011)Aleinikoff and others (2011)Ratcliffe and others (1991)Ratcliffe and others (1991); Aleinikoff and others (2011)Ratcliffe and others (1991); Aleinikoff and others (2011)Aleinikoff and others (2011)Aleinikoff and others (2011)Aleinikoff and others (2011)Ratcliffe and others (1991); Aleinikoff and others (2011)Ratcliffe and others (1991); Aleinikoff and others (2011)Aleinikoff and others (2011)Karabinos and Aleinikoff (1990)Karabinos and Aleinikoff (1990)Aleinikoff and others (2011)Karabinos and Aleinikoff (1990)Karabinos and Aleinikoff (1990)Karabinos and Aleinikoff (1990)Karabinos and Aleinikoff (1990)Walsh and Aleinikoff (1999)Aleinikoff and others (2011)Aleinikoff and others (2011)Aleinikoff and others (2011)Aleinikoff and others (2011)Karabinos and others (1998)Moench and Aleinikoff (2003)Lyons and others (1986)Rankin and Tucker (2009)Moench and Aleinikoff (2003)Moench and Aleinikoff (2003)Aleinikoff and Karabinos (1990); Hueber and others (1990)Rankin and others (2007)Rankin and others (2007)Rankin and others (2007)Black and others (2004)Aleinikoff and Karabinos (1990)Aleinikoff and others (2011)Aleinikoff and others (2011)Lyons and others (1997); Moench and others (1995)Lyons and others (1997); Moench and others (1995)Moench and Aleinikoff (2003)Kohn and others (1992)Rankin and Tucker (2000)Rankin and Tucker (2009)Aleinikoff and others (2011)Aleinikoff and others (2011)Aleinikoff and others (2011)Aleinikoff and others (2011)Moench and Aleinikoff (2003)McWilliams and others (2010)
REFERENCES CITED IN TABLE 1[These references are also included in the References Cited that follow the Description of Map Units on the front of this sheet]
SCIENTIFIC INVESTIGATIONS MAP 3184BEDROCK GEOLOGIC MAP OF VERMONT
SHEET 3 OF 3 (BACK)
U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEYMARCIA K. McNUTT, DIRECTOR
Prepared in cooperation with theSTATE OF VERMONT, VERMONT AGENCY OF NATURAL RESOURCES,
VERMONT GEOLOGICAL SURVEYLAURENCE R. BECKER, STATE GEOLOGIST
BEDROCK GEOLOGIC MAP OF VERMONTBy
Nicholas M. Ratcliffe,1 Rolfe S. Stanley,2* Marjorie H. Gale,3 Peter J. Thompson,3 and Gregory J. Walsh1 With contributions by
Norman L. Hatch, Jr.,1* Douglas W. Rankin,1 Barry L. Doolan,2 Jonathan Kim,3 Charlotte J. Mehrtens,2 John N. Aleinikoff,1 and J. Gregory McHone4
1U.S. Geological Survey, 2University of Vermont, 3 Vermont Geological Survey, 4 Wesleyan University, * Deceased.
2011
Cartography by Linda M. Masonic1
This map is available for sale by U.S. Geological Survey, Information Services, Box 25286, Denver Federal Center, Denver, CO 80225
For product and ordering information:World Wide Web: http://www.usgs.gov; Telephone 1-888-ASK-USGS
Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government Printed on recycled paper
Suggested citation:Ratcliffe, N.M., Stanley, R.S., Gale, M.H., Thompson, P.J., and Walsh, G.J., 2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific Investigations Map 3184, 3 sheets, scale 1:100,000.
GIS database compiled by Gregory J. Walsh and Marjorie H. Gale
Digital cartography by Linda M. Masonic
Edited by James R. Estabrook
The Vermont Geological Survey would like to thank former State Geologists Charles Ratte for initiating State support and Diane Conrad for continued work on this map.
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