Session: Collisional Tectonics of the Northwest Cordillera: Integration of New Data in Basin Development, Magma Petrogenesis, Geophysics, Structural, and Metamorphic Analysis (Posters) (2003 Seattle Annual Meeting (November 2

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170

JURASSIC-CRETACEOUS PALEOGEOGRAPHY, TERRANE ACCRETION, AND TECTONIC EVOLUTION OF WESTERN NORTH AMERICA

BLAKEY, Ronald C. and UMHOEFER, Paul J., Department of Geology, Northern Arizona Univ, Box 4099, Flagstaff, AZ 86011, ronald.blakey@nau.edu, ronald.blakey@nau.edu

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171

DIGITAL COMPILATION OF INLAND-NORTHWEST TECTONIC AND IGNEOUS FEATURES

CLEVELAND, David¹, BOOKSTROM, Arthur A.², BOX, Stephen E.², LEWIS, Reed³, CARLSON, Mary H.⁴ and LARSEN, Jeremy⁴, (1)Geology, Eastern Washington Univ, Cheney, WA 99004, (2)Geologic Division, U.S. Geol Survey, 904 W. Riverside, Spokane, WA 99201, (3)Idaho Geological Survey, Univ of Idaho, Moscow, ID 83844, (4)Information Systems Support, Bremerton, WA 98310, dcleveland@usgs.gov, dcleveland@usgs.gov

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172

EXAMPLES OF DEFORMED ALKALINE ROCKS AND CARBONATITES (DARCS) IN SUTURE ZONES AND AS SOURCES OF ALKALINE ROCKS AND CARBONATITES (ARCS) IN OVERLYING RIFTS FROM THE NORTHWESTERN CORDILLERAN CONTINENTAL MARGIN AND ELSEWHERE

JOHNSTON, Stephen T., School of Earth & Ocean Sciences, Univ of Victoria, PO Box 3055 STN CSC, Victoria, BC V8P 3P6, BURKE, Kevin, Dept. of Geosciences, Univ of Houston, Houston Texas 77204-5503, Houston, TX 77204-5503, ASHWAL, Lewis, School of Geosciences, Univ of the Witswatersrand, Private Bag 3, Witwatersrand, Johannesburg, 2050, South Africa and WEBB, Susan J., School of Geosciences, Univ of the Witswatersrand, Private Bag 3, Witwatersrand, Johannesburg, 2050, stj@uvic.ca, stj@uvic.ca

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173

TECTONIC SIGNIFICANCE OF AN INVERTED METAMORPHIC GRADIENT IN THE CENTRAL METAMORPHIC TERRANE, EASTERN KLAMATH MOUNTAINS, CALIFORNIA: NEW INSIGHTS FROM ⁴⁰AR/³⁹AR THERMOCHRONOLOGY

BARROW, Wendy M., Camborne School of Mines, University of Exeter, Cornwall Campus, Penryn, Cornwall, TR10 9EZ, United Kingdom and METCALF, Rodney V., Geoscience Department, Univ of Nevada, Las Vegas, 4505 Maryland Pkwy, Box 4010, Las Vegas, NV 89154, W.M.Barrow-Johnson@ex.ac.uk, W.M.Barrow-Johnson@ex.ac.uk

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174

NEW CONSTRAINTS ON THE WESTERN IDAHO OROCLINE: A PRIMARY FEATURE IN THE MESOZOIC COLLISION ZONE OR RESULT OF STRIKE SLIP MODIFICATION?

SCHMIDT, Keegan L., Division of Natural Science, Lewis - Clark State College, 500 8th Ave, Lewiston, ID 83501, BURMESTER, Russell F., Geology Department, Western Washington Univ, Bellingham, WA 98225-9080, LEWIS, Reed S., Idaho Geol. Survey, Univ. of Idaho, Moscow, ID 83844-3014, LINK, Paul K., Geosciences, Idaho State Univ, P.O. Box 8072, Pocatello, ID 83209 and FANNING, C. Mark, Research School of Earth Sciences, The Australian National Univ, Canberra. ACT, 2601, Australia, klschmidt@lcsc.edu, klschmidt@lcsc.edu

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175

ALASKA PALEONTOLOGICAL DATABASE – A VERSITAL TOOL FOR GEOLOGISTS IN FIELD MAPPING AND TERRANE ANALYSIS

ZHANG, Ning, Dept. Zoology, Oregon State Univ, Corvallis, OR 97331 and BLODGETT, Robert B., Department of Zoology, Oregon State Univ, Corvallis, OR 97331, zhangn@science.oregonstate.edu, zhangn@science.oregonstate.edu

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176

SEDIMENTOLOGY, PALYNOLOGY, AND PETROLOGY OF THE CRETACEOUS MATANUSKA FORMATION, SOUTH-CENTRAL ALASKA: RELATIONSHIPS BETWEEN FOREARC BASIN DEVELOPMENT AND ACCRETIONARY TECTONIC EVENTS

TROP, Jeffrey M., Dept. of Geology, Bucknell Univ, Lewisburg, PA 17837 and RAVN, Robert L., Aeon LLC, Anchorage, AK 99507, jtrop@bucknell.edu, jtrop@bucknell.edu

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177

STRATIGRAPHY, PROVENANCE, AND TECTONIC SIGNIFICANCE OF NEWLY-DEFINED MESOZOIC STRATA IN THE NORTHWESTERN TALKEETNA MOUNTAINS

HAMPTON, Brian A.¹, RIDGWAY, Kenneth D.¹, O'NEILL, J. Michael², BLODGETT, Robert B.³ and GUTENKUNST, Michele L.¹, (1)Department of Earth & Atmospheric Sciences, Purdue Univ, West Lafayette, IN 47907-2051, (2)U.S. Geol Survey, Mail Stop 964, Denver Federal Center, Denver, CO 80225, (3)Dept. Zoology, Oregon State Univ, Corvallis, OR 97331, bhampton@purdue.edu, bhampton@purdue.edu

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178

CRETACEOUS-EARLY EOCENE TWO STAGE BASIN DEVELOPMENT, YUKON FLATS BASIN, NORTH-CENTRAL ALASKA

FARMER, Eric T.¹, RIDGWAY, Kenneth D.¹, BRADLEY, Dwight C.² and TILL, Alison B.², (1)Earth and Atmospheric Sciences, Purdue Univ, Earth & Atmospheric Science, 550 Stadium Mall Drive., Purdue University, West Lafayette, IN 47907-2051, (2)USGS, 4200 University Drive, Anchorage, AK 99508, efarmer@purdue.edu, efarmer@purdue.edu

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179

TERRANE-SCALE CRUSTAL STRUCTURES OF SOUTHCENTRAL ALASKA INFERRED FROM REGIONAL GEOPHYSICAL STUDIES

GLEN, Jonathan M.G.¹, MCPHEE, Darcy K.¹, SCHMIDT, Jeanine M.², PELLERIN, Louise³ and MORIN, Robert L.⁴, (1)U.S. Geol Survey, MS989, 345 Middlefield Road, Menlo Park, CA 94025, (2)USGS, Anchorage, AK, (3)Green Engineering Inc, Anchorage, AK, (4)U.S. Geol Survey, 345 Middlefield Rd, Menlo Park, CA 94025, Jglen@usgs.gov, Jglen@usgs.gov

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180

MESOZOIC AND TERTIARY STRUCTURAL HISTORY OF THE NORTHERN TALKEETNA MOUNTAINS

O'NEILL, J.M., USGS, Denver, CO 80225, SCHMIDT, J.M., USGS, Anchorage, AK, GLEN, J.M.G., USGS, Menlo Park, CA and PELLERIN, Louise, Green Engineering Inc, Anchorage, AK, jmoneill@usgs.gov, jmoneill@usgs.gov

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181

STRUCTURE AND KINEMATICS OF A TRANSECT ACROSS THE KAHILTNA ASSEMBLAGE, SOUTH-CENTRAL ALASKA

BIER, Sara E. and FISHER, Donald M., Geosciences, The Pennsylvania State University, University Park, 16802, sbier@geosc.psu.edu, sbier@geosc.psu.edu

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182

GEOCHRONOLOGY FROM A CONTACT METAMORPHIC ASSEMBLAGE NEAR THE EDGE OF THE WRANGELLIA COMPOSITE TERRANE, TALKEETNA MOUNTAINS, ALASKA

MCPHILLIPS, Devin and DAVIDSON, Cameron, Geology, Carleton College, One North College Street, Northfield, MN 55057, devin_mcphillips@yahoo.com, devin_mcphillips@yahoo.com

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183

THE NORTHWESTERN EDGE OF WRANGELLIA: STRATIGRAPHIC AND INTRUSIVE LINKS BETWEEN CRUSTAL BLOCKS FROM THE PENINSULAR TERRANE TO BROAD PASS

SCHMIDT, J.M.¹, O'NEILL, J.M.², SNEE, L.W.², BLODGETT, R.B.³, RIDGWAY, K.D.⁴, WARDLAW, B.R.⁵ and BLOME, C.D.², (1)USGS, Anchorage, AK 99508, (2)USGS, Denver, CO, (3)Oregon State Univ, Corvallis, OR, (4)Purdue Univ, West Lafayette, IN, (5)USGS, Reston, VA, jschmidt@usgs.gov, jschmidt@usgs.gov

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184

TERTIARY VOLCANISM ACROSS THE WRANGELLIA COMPOSITE TERRANE OF SOUTH-CENTRAL ALASKA

COLE, Ronald B., Dept. of Geology, Allegheny College, Meadville, PA 16335, rcole@allegheny.edu, rcole@allegheny.edu

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185

STRATIGRAPHIC AND STRUCTURAL CHARACTER OF THE KUSKOKWIM GROUP, NORTHERN KUSKOKWIM MOUNTAINS, SOUTHWESTERN ALASKA

KALBAS, James L.¹, RIDGWAY, Kenneth¹ and MILLER, Marti L.², (1)Earth and Atmospheric Sciences, Purdue Univ, 550 Stadium Mall Dr, Purdue University, West Lafayette, IN 47907-2051, (2)US Geol Survey, 4200 University Dr, Anchorage, AK 99508-4626, jkalbas@purdue.edu, jkalbas@purdue.edu

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186

CRYSTALLIZATION DEPTHS OF CRETACEOUS PLUTONS ALONG THE WRANGELL TRANSECT, SOUTHEAST ALASKA

CASSEL, Elizabeth and DAVIDSON, Cameron, Geology, Carleton College, One North College Street, Northfield, MN 55057, casseljay@bresnan.net, casseljay@bresnan.net

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187

DENALI FAULT GEOLOGIC RELATIONS AT GUNSIGHT PASS, DENALI NATIONAL PARK, ALASKA

FORD, Arthur B., Menlo Park, CA 94025, CSEJTEY, Bela, Palo Alto, CA and WRUCKE, Chester T., Portola Valley, CA, abford@aol.com, abford@aol.com

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A GEOPHYSICAL TRANSECT ACROSS THE ALASKA RANGE: RELATIONSHIP BETWEEN CRUSTAL STRUCTURE AND THE NOVEMBER, 2002, M=7.9 DENALI EARTHQUAKE

FISHER, Michael A.¹, PELLERIN, Louise², GLEN, Jonathan M.³, RATCHKOVSKI, Natalia A.⁴ and NOKLEBERG, Warren J.³, (1)US Geol Survey, 345 Middlefield Rd, Menlo Park, CA 94025-3591, (2)Consulting Geophysicist, 2215 Curtis St, Berkeley, CA 94702, (3)U.S. Geol Survey, 345 Middlefield Road, Menlo Park, CA 94025, (4)Geophysical Institute, Univ of Alaska, Fairbanks, P.O. Box 757320, Fairbanks, AK 99775, mfisher@octopus.wr.usgs.gov, mfisher@octopus.wr.usgs.gov

2003 Seattle Annual Meeting (November 2–5, 2003)

T146. Collisional Tectonics of the Northwest Cordillera: Integration of New Data in Basin Development, Magma Petrogenesis, Geophysics, Structural, and Metamorphic Analysis (Posters)