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Cordilleran Section - 121st Annual Meeting - 2025

Session No. 25
Thursday, 3 April 2025: 1:30 PM-5:30 PM
Granada/Hermosa (Holiday Inn Sacramento Downtown - Arena)

T9. Mesozoic-Cenozoic Orogenesis Along the Pacific Northwest Cordilleran Margin

GSA Sedimentary Geology Division; GSA Structural Geology and Tectonics Division

 

Michael Darin, Melanie Michalak, Rebecca J. Dorsey and Kathleen Surpless, Advocates
Paper #
Start Time
25-1
1:30 PM
STRATIGRAPHIC AND STRUCTURAL CHARACTERIZATION OF THE EOCENE BLUE MOUNTAIN UNIT TO UNDERSTAND TRENCH-FOREARC INTERACTIONS DURING INITIATION OF THE OLYMPIC SUBDUCTION COMPLEX AND ANCESTRAL CASCADES ARC
DONAGHY, Erin1, EDDY, Michael2, RIDGWAY, Kenneth2 and REGIER, Nicholas3, (1)Department of Geoscience, University of Nevada, Las Vegas, Las Vegas, NV 89154, (2)Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907, (3)Jackson School of Geosciences, University of Texas at Austin, Austin, TX 78746
25-2
1:50 PM
REVISED STRATIGRAPHIC AND STRUCTURAL HISTORY OF PALEOGENE BASALT-RHYOLITE COMPLEX EXPOSED IN THE PAISLEY HILLS, SOUTH-CENTRAL OREGON
GRAY, Gary1, O'SULLIVAN, Paul2, BIERBOWER, Andrew3, BRUCHMILLER, Emily3, TAYLOR, Devin3 and JOHNSON, Kenneth3, (1)Earth Environmental and Planetary Sciences, Rice University, 6100 Main St, Houston, TX 77005, (2)GeoSep Services, 1521 Pine Cone Road, Moscow, ID 83843, (3)Department of Natural Sciences, University of Houston-Downtown, 1 Main Street, Houston, TX 77002
25-3
2:10 PM
REDEFINED LATE CRETACEOUS DEPOSITIONAL AGE FOR THE DOTHAN FORMATION: IMPLICATIONS FOR FOREARC EVOLUTION AND TERRANE COLLISIONS ALONG THE CORDILLERAN MARGIN IN SOUTHWEST OREGON
DARIN, Michael, Oregon Department of Geology and Mineral Industries, 165 E. 7th Avenue, Suite 200, Eugene, OR 97401, DORSEY, Rebecca J., Department of Earth Sciences, University of Oregon, 1272 University of Oregon, Eugene, OR 97403-1272, MICHALAK, Melanie, Department of Geology, Cal Poly Humboldt, 1 Harpst St, Arcata, CA 95521 and MCCLAUGHRY, Jason D., Oregon Department of Geology and Mineral Industries, 1995 3rd St, Suite 130, Baker City, OR 97814
25-4
2:30 PM
DRIVERS OF CENOZOIC ACTIVE TECTONISM IN THE KLAMATH MOUNTAIN PROVINCE: FROM TERRANE ACCRETION TO TRIPLE JUNCTION ARRIVAL
FURLONG, Kevin1, CASHMAN, Susan2, MCKENZIE, Kirsty A.3, MICHALAK, Melanie2 and KIRBY, Eric4, (1)Department of Geosciences, Pennsylvania State University, 542 Deike Building, University Park, PA 16802, (2)Department of Geology, Cal Poly Humboldt, 1 Harpst St, Arcata, CA 95521-8222, (3)Department of Geology and Environmental Science, James Madison University, Harrisonburg, VA 22807, (4)Department of Earth, Marine and Environmental Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
25-5
2:50 PM
CRUSTAL FAULTING AT THE MENDOCINO TRIPLE JUNCTION INFERRED FROM RIVER AND MARINE TERRACES IN THE MATTOLE RIVER WATERSHED
VERMEER, Jessie1, DELONG, Stephen1, HAMMER, Morena1, PATTON, Jason R.2, TREXLER, Charles1, HEMPHILL-HALEY, Mark3, KELSEY, Harvey M.3, LEROY, Tom4 and ROBINSON, Michelle4, (1)United States Geological Survey, Earthquake Science Center, PO Box 158, Moffett Field, CA 94035, (2)Conservation, California Geological Survey, 801 K St., Sacramento, CA 95814, (3)Geology, Cal Poly - Humboldt, 1 Harpst St., Arcata, CA 95521, (4)Pacific Watershed Associates, McKinleyville, CA 95519
 
3:10 PM
Discussion
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