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2009 Portland GSA Annual Meeting (18-21 October 2009)

Session No. 61
Sunday, 18 October 2009: 1:30 PM-5:30 PM
B110/111/112 (Oregon Convention Center)

T49. Neoproterozoic through Cretaceous Evolution of the North American Cordilleran Margin: Contrasting Tectonics, Paleogeography, and Paleoenvironments

GSA Structural Geology and Tectonics Division; GSA Sedimentary Geology Division

 

Christopher S. Holm-Denoma and Paula J. Noble, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
1
1:35 PM
EVIDENCE OF GRENVILLE-AGE DEFORMATION AND METAMORPHISM IN BELT SUPERGROUP METAPELITES OF NORTHERN IDAHO
NESHEIM, Timothy O.1, GILOTTI, Jane A.2, MCCLELLAND, William C.2, LANG, Helen M.3, VERVOORT, Jeffrey D.4, TEFFT, Ashley M.4 and FOSTER Jr, C.T.5, (1)North Dakota Geological Survey, Bismarck, ND 58501, (2)Department of Geoscience, University of Iowa, Iowa City, IA 52242, (3)Dept. Geology & Geography, West Virginia Univ, P.O. Box 6300, Morgantown, WV 26506-6300, (4)School of Earth and Environmental Sciences, Washington State University, Pullman, WA 99164, (5)Dept. of Earth & Environmental Sciences, University of Iowa, Iowa City, IA 52242, tnesheim@yahoo.com, tnesheim@yahoo.com
2
1:50 PM
FOUR STAGES IN CORDILLERAN EVOLUTION
MONGER, James W.H., Geological Survey of Canada, #101 605 Robson Street, Vancouver, BC V6B 5J3, Canada, jimonger@shaw.ca, jimonger@shaw.ca
3
2:10 PM
EDIACARAN-EARLY CAMBRIAN CORDILLERAN VOLCANISM AND INCISION: EVIDENCE FOR RIFTING AND EUSTATIC LOWSTAND?
HAGADORN, James W., Department of Earth Sciences, Denver Museum of Nature & Science, 2001 Colorado Blvd, Denver, CO 80205, jwhagadorn@dmns.org, jwhagadorn@dmns.org
4
2:30 PM
BREAKING UP IS HARD TO DO: EVOLUTION OF THE NORTH AMERICAN CORDILLERAN MARGIN IN THE CONTEXT OF THE SIBERIAN CONNECTION
SEARS, James, Dept. of Geosciences, University of Montana, 32 Campus Drive #1296, Missoula, MT 59812-1296, james.sears@umontana.edu, james.sears@umontana.edu
5
2:45 PM
MANTLE DRIP FROM THE RISING LEMHI ARCH: 500 MA PLUTONS AND DETRITAL ZIRCONS IN UPPER CAMBRIAN SANDSTONES, EASTERN IDAHO
LINK, Paul Karl, Department of Geosciences, Idaho State Univ, ISU Campus Box 8072, Pocatello, ID 83209 and JANECKE, Susanne, Utah State Univ, Logan, UT 84322, linkpaul@isu.edu, linkpaul@isu.edu
6
3:00 PM
LATE PALEOZOIC CONTRACTIONAL TECTONICS ON THE WESTERN LAURENTIAN MARGIN: A PROGRESS REPORT
CASHMAN, Patricia H.1, TREXLER Jr., James H.1, DAVYDOV, Vladimir2, SNYDER, Walter3 and TAYLOR, Wanda4, (1)Department of Geological Sciences and Engineering, University of Nevada, MS 172, Reno, NV 89557, (2)Department of Geosciences, Boise State University, 1910 University Drive, Boise, ID 83725, (3)GSA Geoinformatics Division, 1910 University Drive, MS 1535, Boise, ID 83725, (4)Department of Geoscience, University of Nevada, Las Vegas, 4505 Maryland Parkway, 89154-4010, Las Vegas, NV 89154-4010, pcashman@mines.unr.edu, pcashman@mines.unr.edu
 
3:15 PM
Break
7
3:30 PM
THE TRIASSIC/JURASSIC BOUNDARY, COLORADO PLATEAU AREA, USA: MAGNETOSTRATIGRAPHIC CORRELATION OF THE MOENAVE FORMATION WITH THE STRATA FROM ST. AUDRIE'S BAY, UK, MOROCCO, AND NEWARK/HARTFORD BASINS
DONOHOO-HURLEY, Linda Lee, Earth and Planetary Sciences, University of New Mexico, 7313 Via Contenta, Albuquerque, NM 87113, GEISSMAN, J.W., Dept. Earth and Planetary Sciences, University of New Mexico, MSC 03 2040, Albuquerque, NM 87131, LUCAS, Spencer G., New Mexico Museum of Natural History and Science, 1801 Mountain Road N.W, Albuquerque, NM 87104 and KUERSCHNER, Wolfram M., Laboratory of Palaeobotany and Palynology, Utrecht Univ, Budapestlaan 4, Utrecht, 3584, Netherlands, ldonohoo@unm.edu, ldonohoo@unm.edu
8
3:45 PM
HIGH-PRECISION U-PB DATING OF NEOBLASTIC SPHENE FROM MYLONITIC ROCKS OF THE COUGAR CREEK COMPLEX, BLUE MOUNTAINS PROVINCE, OREGON – IDAHO: IMPLICATIONS FOR THE INTERPLAY BETWEEN DEFORMAITON AND ARC MAGMATISM
KURZ, Gene Alan1, NORTHRUP, Clyde J.1 and SCHMITZ, M.D.2, (1)Department of Geosciences, Boise State University, 1910 University Drive, Boise, ID 83725, (2)Department of Geosciences, Boise State University, Boise, ID 83725, genekurz@u.boisestate.edu, genekurz@u.boisestate.edu
9
4:00 PM
OVERVIEW OF JURASSIC-CRETACEOUS MAGMATISM IN THE BLUE MOUNTAINS PROVINCE (NE OREGON & W IDAHO): INSIGHTS FROM NEW PB/U (SHRIMP-RG) AGE DETERMINATIONS
JOHNSON, Kenneth, Department of Natural Sciences, University of Houston-Downtown, 1 Main Street, Suite N813, Houston, TX 77002 and SCHWARTZ, Joshua J., Department of Geological Sciences, University of Alabama, Box 870338, Tuscaloosa, AL 35487, johnsonk@uhd.edu, johnsonk@uhd.edu
10
4:15 PM
ORIGIN OF PAIRED LATE JURASSIC HIGH AND LOW SR/Y MAGMATIC BELTS IN THE BLUE MOUNTAINS PROVINCE, NE OREGON
SCHWARTZ, Joshua J., Department of Geological Sciences, University of Alabama, Box 870338, Tuscaloosa, AL 35487 and JOHNSON, Kenneth, Department of Natural Sciences, University of Houston-Downtown, 1 Main Street, Suite N813, Houston, TX 77002, jschwartz@geo.ua.edu, jschwartz@geo.ua.edu
11
4:30 PM
NEW GEOCHRONOLOGICAL CONSTRAINTS ON THE TIMING OF DEPOSITION IN THE COON HOLLOW AND WEATHERBY FORMATIONS, AND CORRELATIONS BETWEEN THE WALLOWA AND OLDS FERRY TERRANES, BLUE MOUNTAINS PROVINCE, NORTHERN U.S. CORDILLERA
TUMPANE, Kyle P., Department of Geosciences, Boise State University, 1910 University Drive, Boise, ID 83725 and SCHMITZ, M.D., Department of Geosciences, Boise State University, Boise, ID 83725, kyletumpane@u.boisestate.edu, kyletumpane@u.boisestate.edu
12
4:45 PM
INITIATION OF THE CRETACEOUS, ANDEAN-TYPE MARGIN OF THE WESTERN U.S. CORDILLERA: INSIGHTS FROM DETRITAL-ZIRCON AGES OF THE COON HOLLOW FORMATION, IDAHO, U.S.A
LAMASKIN, Todd, Wisconsin Geological and Natural History Survey, University of Wisconsin, 3817 Mineral Pt. Road, Madison, WI 53705, DORSEY, Rebecca J., Dept. of Geological Sciences, 1272 University of Oregon, Eugene, OR 97403-1272 and VERVOORT, Jeffery D., School of the Environment, Washington State University, Pullman, WA 99164, tlamaskin@gmail.com, tlamaskin@gmail.com
13
5:00 PM
INFLUENCE OF GROWING STRUCTURES ON CRETACEOUS ALLUVIAL SYSTEMS ALONG THE CORDILLERAN THRUST-BELT FRONT, VALLEY OF FIRE, SOUTHERN NEVADA
MCNAMARA, Kelsey C., Earth & Planetary Sciences, University of New Mexico, Albuquerque, NM 87131-0001 and SCHMITT, James G., Department of Earth Sciences, Montana State University, Bozeman, MT 59717, kelseymcnamara@yahoo.com, kelseymcnamara@yahoo.com
14
5:15 PM
PALEOMAGNETISM AND ROCK MAGNETISM OF REMAGNETIZED CARBONATE ROCKS FROM THE HELENA SALIENT, WESTERN MONTANA
BAUGH, Benjamin F., HOUSEN, Bernard A. and BURMESTER, Russ, Geology Department, Western Washington University, 516 High St, Bellingham, WA 98225-9080, baughb@students.wwu.edu, baughb@students.wwu.edu
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