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GSA Connects 2021 in Portland, Oregon

Session No. 100
Monday, 11 October 2021: 1:30 PM-5:30 PM
A106 (Oregon Convention Center)

T9. Late Cretaceous–Eocene (pre-Cascadia) Tectonics from the Greater Pacific Northwest Margin to the Rocky Mountains

GSA Geochronology Division; GSA Sedimentary Geology Division; GSA Structural Geology and Tectonics Division; GSA Geophysics and Geodynamics Division; GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division

 

Paul Umhoefer, Robert B. Miller, Stacia M. Gordon and Thomas Kalakay, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
100-1
1:35 PM
Withdrawn
100-2
1:55 PM
UPPER PLATE RESPONSE TO RIDGE-TRENCH INTERACTION AND OCEANIC PLATEAU ACCRETION, WASHINGTON CASCADES AND SURROUNDING REGION: IMPLICATIONS FOR PALEOGENE PLATE TECTONIC EVOLUTION OF THE PACIFIC NORTHWEST
MILLER, Robert, Geology, San Jose State University, 1 Washington Square, San Jose, CA 95192, UMHOEFER, Paul, School of Earth and Sustainability, Northern Arizona University, Flagstaff, AZ 86011, EDDY, Michael, Department of Earth, Planetary, and Atmospheric Sciences, Purdue University, West Lafayette, IN 47907-2051 and TEPPER, Jeffrey, Department of Geology, University of Puget Sound, Tacoma, WA 98416
100-3
2:10 PM
METASEDIMENTARY ROCKS OF THE NORTH CASCADES CONTINENTAL MAGMATIC ARC: IMPORTANT TRACKERS OF THE RHEOLOGIC HISTORY OF AN ARC SYSTEM
GORDON, Stacia1, HANSON, Ann1, SAUER, Kirsten B.2 and MILLER, Robert B.3, (1)Department of Geological Sciences, University of Nevada, Reno, 1664 N. Virginia, MS 0172, Reno, NV 89557, (2)Earth and Environment Sciences, Los Alamos National Laboratory, Los Alamos, NM 87545, (3)Geology Department, San Jose State University, San Jose, CA 95192
100-4
2:25 PM
THE STRUCTURAL AND DEPOSITIONAL EVOLUTION OF PULL-APART BASINS: AN EXAMPLE FROM THE EOCENE CHUMSTICK BASIN, CENTRAL WASHINGTON
DONAGHY, Erin1, UMHOEFER, Paul2, EDDY, Michael1 and MILLER, Robert B.3, (1)Department of Earth, Planetary, and Atmospheric Sciences, Purdue University, West Lafayette, IN 47907-2051, (2)School of Earth and Sustainability, Northern Arizona University, Box 4099, Flagstaff, AZ 86011, (3)Geology Department, San Jose State University, San Jose, CA 95192
100-5
2:40 PM
MAKING THE COLUMBIA EMBAYMENT WITH OBLIQUE FLAT-SLAB SUBDUCTION (Invited Presentation)
HUMPHREYS, Eugene, Earth Sciences, University of Oregon, Eugene, OR 97403, UMHOEFER, Paul, School of Earth and Sustainability, Northern Arizona University, Box 4099, Flagstaff, AZ 86011 and MILLER, Robert B., Department of Geology, San Jose State University, San Jose, CA 95192-0102
100-6
3:00 PM
REEVALUATION OF THE THICK EOCENE-AGE COLUMBIA BASIN, SOUTH CENTRAL WASHINGTON – N OREGON, BASED ON A SYNTHESIS OF GEOLOGICAL AND GEOPHYSICAL DATA
UMHOEFER, Paul, School of Earth and Sustainability, Northern Arizona University, Box 4099, Flagstaff, AZ 86011, HUMPHREYS, Eugene, Department of Geological Sciences, University of Oregon, Eugene, 1272 University of Oregon, Eugene, OR 97403 and MILLER, Robert B., Geology Department, San Jose State University, San Jose, CA 95192
 
3:15 PM
Break
100-7
3:30 PM
MIGRATING EOCENE MAGMATISM AND TECTONISM ACROSS THE PACIFIC NORTHWEST: SLAB ROLLBACK, SLAB WINDOW, OR BOTH?
TEPPER, Jeffrey, Department of Geology, University of Puget Sound, Tacoma, WA 98416 and MILLER, Robert B., Geology Department, San Jose State University, San Jose, CA 95192
100-8
3:45 PM
TRIPLE OXYGEN ISOTOPE PALEOALTIMETRY OF METAMORPHIC CORE COMPLEXES
METHNER, Katharina, Stanford University Department of Geological Sciences, 473 Via Ortega, Stanford, CA 94305-4121, IBARRA, Daniel E., Brown University, Providence, RI, MULCH, Andreas, Institute of Geosciences, Goethe University Frankfurt, Altenhoeferallee 1, Frankfurt am Main, 60438, Germany and CHAMBERLAIN, C. Page, Geological Sciences, Stanford University, Stanford, CA 94305
100-9
4:00 PM
PROFILE OF A PALEOGENE ANDES IN THE NORTH AMERICAN WEST
CASSEL, Elizabeth1, SMITH, Michael2, YOUNG-DAHL, Erin1 and BREECKER, Daniel O.3, (1)Geological Sciences, University of Idaho, 875 Perimeter Drive MS 3022, Moscow, ID 83844, (2)School of Earth and Sustainability, Northern Arizona University, 624 S Knoles Drive, Flagstaff, AZ 86011, (3)Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78712
100-10
4:15 PM
LATE CRETACEOUS OROGENESIS ACROSS THE IDAHO BATHOLITH OF NORTH-CENTRAL IDAHO
SCHMIDT, Keegan1, DI FIORI, Russell, Ph.D., P.G.2 and LEWIS, Reed S.2, (1)Department of Natural Sciences, Lewis-Clark State College, Meriwether Lewis Hall, 500 8th Avenue, Lewiston, ID 83501, (2)Idaho Geological Survey, University of Idaho, 875 Perimeter Drive, MS 3014, Moscow, ID 83844
100-11
4:30 PM
AGE, GEOCHEMISTRY AND SOURCE OF THE PIONEER INTRUSIVE SUITE; PIONEER METAMORPHIC CORE COMPLEX SOUTH-CENTRAL IDAHO
MULROONEY, Laura, VOGL, Jim and FOSTER, David A., Department of Geological Sciences, University of Florida, Gainesville, FL 32611
100-12
4:45 PM
DEVELOPMENT OF AN OROGENIC PLATEAU DURING MID-CRUSTAL FLOW IN THE CORDILLERAN HINTERLAND: EVIDENCE FROM FOOTWALL ROCKS OF THE ANACONDA METAMORPHIC CORE COMPLEX OF WESTERN MONTANA
KALAKAY, Thomas, Department of Geology, Rocky Mountain College, 1511 Poly Drive, Billings, MT 59102, LONN, Jeff, Montana Bureau of Mines and Geology, 1505 West Park Street, Butte, MT 59701 and FOSTER, David A., Department of Geological Sciences, University of Florida, Gainesville, FL 32611
100-13
5:00 PM
THE LARAMIDE OROGENY: MODERN UNDERSTANDING OF THE STRUCTURAL STYLE, TIMING, AND SPATIAL DISTRIBUTION OF A CLASSIC FORELAND THICK-SKINNED TECTONIC SYSTEM
WEIL, Arlo, PhD, Department of Geology, Bryn Mawr College, Bryn Mawr, PA 19010 and YONKEE, Adolph, Department of Earth and Environmental Sciences, Weber State University, 1415 Edvalson St - DEPT 2507, Ogden, UT 84408-2507
Recorded Presentation
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