CALL FOR PROPOSALS:

ORGANIZERS

  • Harvey Thorleifson, Chair
    Minnesota Geological Survey
  • Carrie Jennings, Vice Chair
    Minnesota Geological Survey
  • David Bush, Technical Program Chair
    University of West Georgia
  • Jim Miller, Field Trip Chair
    University of Minnesota Duluth
  • Curtis M. Hudak, Sponsorship Chair
    Foth Infrastructure & Environment, LLC

 

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Session No. 270
Wednesday, 12 October 2011: 1:30 PM-5:30 PM
Room 200A-C (Minneapolis Convention Center)

T8. Tectonic Evolution of Eastern Oregon and Western Idaho

GSA Structural Geology and Tectonics Division; GSA Geophysics Division

 

Basil Tikoff, Richard M. Gaschnig, Todd LaMaskin and Clyde J. Northrup, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
1
1:35 PM
A STRAIN GRADIENT WITHIN THE FOOTWALL OF THE PIONEER CORE COMPLEX, IDAHO: COMPLEX OVERPRINTING OF CRETACEOUS STRUCTURES BY EOCENE EXTENSIONAL STRAIN AND POSSIBLE SYN-EXTENSIONAL SHORTENING
VOGL, James J., Department of Geological Sciences, University of Florida, Gainesville, FL 32611, DIEDESCH, Timothy, Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, 1412 Circle Dr, Knoxville, TN 37996-1410, RODGERS, David W., Department of Geosciences, Idaho State University, 921 South 8th Ave., Box 8072, Pocatello, ID 83209 and LEXVOLD, Angela, University of Minnesota, Morris, 600 E 4th St, Morris, MN 56267, jvogl@geology.ufl.edu, jvogl@geology.ufl.edu
2
1:50 PM
SEISMIC STRUCTURE OF THE HIGH LAVA PLAINS AND SURROUNDING REGIONS
FOUCH, Matthew J.1, JAMES, David E.1, WAGNER, Lara S.2, LONG, Maureen D.3, CARLSON, Richard W.4, EAGAR, Kevin C.5 and ROTH, Jeffrey B.6, (1)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, (2)Department of Geological Sciences, University of North Carolina - Chapel Hill, Chapel Hill, NC 27599, (3)Department of Geology and Geophysics, Yale University, New Haven, CT 06520, (4)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC, 20015, (5)Shell Exploration and Production Company, Houston, TX 77079, (6)ExxonMobil Exploration Company, 223 Benmar Dr, Houston, TX 77060, fouch@dtm.ciw.edu, fouch@dtm.ciw.edu
3
2:10 PM
STRUCTURE, INTRUSIVE HISTORY, AND LOCATION OF THE EASTERN MARGIN OF THE WALLOWA TERRANE, WESTERN IDAHO
LEWIS, Reed S., Idaho Geological Survey, University of Idaho, 875 Perimeter Drive MS3014, Moscow, ID 83844-3014, SCHMIDT, Keegan L., Division of Natural Science, Lewis - Clark State College, Lewiston, ID 83501 and SCHWARTZ, Darin M., Department of Geological Sciences, University of Idaho, 875 Perimeter Dr MS 3022, Moscow, ID 83844-3022, reedl@uidaho.edu, reedl@uidaho.edu
4
2:25 PM
LINKING THE WALLOWA TERRANE TO NORTH AMERICA: LATEST JURASSIC–EARLIEST CRETACEOUS COON HOLLOW FORMATION, BLUE MOUNTAINS PROVINCE, NORTHEASTERN OREGON AND WESTERN IDAHO
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, Jeff, School of the Environment, Washington State University, Pullman, WA 99164, tlamaskin@gmail.com, tlamaskin@gmail.com
5
2:40 PM
AN EXPOSED CROSS SECTION THROUGH A LATE PALEOZOIC–MESOZOIC ACCRETIONARY COMPLEX: THE SOUTHERN MARGIN OF THE BAKER TERRANE, BLUE MOUNTAINS PROVINCE, NORTHEAST OREGON
STARNS, Edward C. and SNOKE, Arthur W., Department of Geology and Geophysics, University of Wyoming, Dept. 3006, 1000 E. University Avenue, Laramie, WY 82071, estarns@uwyo.edu, estarns@uwyo.edu
6
2:55 PM
MAGMATIC CONSTRUCTION OF THE BALD MOUNTAIN BATHOLITH, NE OREGON: INSIGHTS FROM U-PB ZIRCON GEOCHRONOLOGY AND HAFNIUM-OXYGEN ISOTOPE GEOCHEMISTRY
SCHWARTZ, Joshua J., Department of Geological Sciences, University of Alabama, Box 870338, Tuscaloosa, AL 35487, JOHNSON, Kenneth, Department of Natural Sciences, University of Houston-Downtown, 1 Main Street, Suite N813, Houston, TX 77002, MUELLER, Paul A., Department of Geological Sciences, University of Florida, 241 Williamson Hall, Gainesville, FL 32601, VALLEY, John W., Department of Geoscience, University of Wisconsin, Madison, WI 53706, STRICKLAND, Ariel, Department of Geoscience, University of Wisconsin - Madison, 1215 W Dayton St, Madison, WI 53706 and WOODEN, Joseph L., USGS-Stanford Ion Microprobe Facility, Stanford University, Stanford, CA 94305, joshua.j.schwartz@gmail.com, joshua.j.schwartz@gmail.com
 
3:10 PM
Break
7
3:25 PM
PRELIMINARY GEOCHRONOLOGY AND GEOCHEMISTRY OF THE HICKS BUTTE COMPLEX, CENTRAL CASCADES, WASHINGTON: POSSIBLE LINKS BETWEEN POLYGENETIC MESOZOIC ARC ROCKS OF THE CENTRAL CASCADES AND THE BLUE MOUNTAINS PROVINCE
MACDONALD Jr, James H., Marine and Ecological Sciences, Florida Gulf Coast State University, 10501 FGCU Boulevard South, Fort Myers, FL 33965 and PECHA, Mark, Department of Geosciences, University of Arizona, Tucson, AZ 85721, jmacdona@fgcu.edu, jmacdona@fgcu.edu
8
3:40 PM
NEW U-PB (CA-TIMS) AGE CONSTRAINTS ON THE DEPOSITION OF THE WEATHERBY FORMATION, BLUE MOUNTAINS PROVINCE, NORTHEASTERN OREGON
WARE, Bryant, Dept. of Geological Sciences, Boise State University, Boise, ID 83725 and SCHMITZ, Mark, Department of Geosciences, Boise State University, 1910 University Drive, Boise, ID 83725, bryantware@u.boisestate.edu, bryantware@u.boisestate.edu
9
3:55 PM
LOADING AND METAMORPHISM WITHIN THE SALMON RIVER SUTURE ZONE, WEST-CENTRAL IDAHO
STOWELL, Harold H., Department of Geological Sciences, University of Alabama, Tuscaloosa, AL 35487, MCKAY, Matthew P., Department of Geology and Geography, West Virginia University, 98 Beechurst Ave, 330 Brooks Hall, Morgantown, WV 26506, SCHWARTZ, Joshua J., Department of Geological Sciences, University of Alabama, Box 870338, Tuscaloosa, AL 35487 and GRAY, Keith D., School of the Environment, Washington State University, PO Box 642812, Pullman, WA 99164-2812, hstowell@as.ua.edu, hstowell@as.ua.edu
10
4:10 PM
THE WESTERN IDAHO SHEAR ZONE, WEST MOUNTAINS, IDAHO: PRELIMINARY STRUCTURAL GEOLOGY RESULTS OF IDOR PROJECT
BRAUDY, Nicole, Geoscience, University of Wisconsin-Madison, 1215 West Dayton St, Madison, WI 53706, TIKOFF, Basil, Department of Geoscience, University of Wisconsin, 1215 W Dayton St, Madison, WI 53706, GASCHNIG, Richard M., Department of Geology, University of Maryland, College Park, MD 20742 and VERVOORT, Jeff, School of the Environment, Washington State University, Pullman, WA 99164, nbraudy@gmail.com, nbraudy@gmail.com
11
4:25 PM
THE MANY (AND SOMETIMES LOST) ARCS OF IDAHO
GASCHNIG, Richard M., Department of Geology, University of Maryland, College Park, MD 20742, VERVOORT, Jeff, School of the Environment, Washington State University, Pullman, WA 99164, TIKOFF, Basil, Department of Geoscience, University of Wisconsin, 1215 W Dayton St, Madison, WI 53706 and LEWIS, Reed S., Idaho Geological Survey, University of Idaho, 875 Perimeter Drive MS3014, Moscow, ID 83844-3014, gaschnig@umd.edu, gaschnig@umd.edu
12
4:40 PM
LATE CRETACEOUS MAGMATISM IN SOUTHWEST MONTANA: THE BOULDER BATHOLITH AND ELKHORN MOUNTAINS VOLCANICS
IHINGER, Phillip1, MAHONEY, J. Brian2, JOHNSON, Breck R.1, KOHEL, Chris3, GUY, Alexandra K.1, KIMBROUGH, David L.3 and FRIEDMAN, Richard M.4, (1)Department of Geology, University of Wisconsin- Eau Claire, 105 Garfield Ave, Eau Claire, WI 54702, (2)Department. of Geology, University of Wisconsin Eau Claire, Eau Claire, WI 54702, (3)Department of Geological Sciences, San Diego State University, San Diego, CA 92182, (4)Pacific Centre for Isotopic and Geochemical Research, Univ of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4, Canada, ihinger@uwec.edu, ihinger@uwec.edu
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