GSA Connects 2021 in Portland, Oregon

Session No. 168
Tuesday, 12 October 2021: 1:30 PM-5:30 PM
Portland Ballroom 257 (Hybrid Room) (Oregon Convention Center)

T7. Initiation and Evolution of Arc-Forearc Systems in Cascadia and Beyond

GSA Structural Geology and Tectonics Division; GSA Sedimentary Geology Division; GSA Geophysics and Geodynamics Division; GSA Marine and Coastal Geoscience Division; GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division

 

Michael Darin, Kristin McDougall, James Jackson, Paul Umhoefer, Megan Mueller, Devon Orme and Harold Tobin, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
1:35 PM
DEVELOPMENT OF THE KUMANO FOREARC BASIN, NANKAI TROUGH SUBDUCTION ZONE
MOORE, Gregory1, CORNARD, Pauline2 and STRASSER, Michael2, (1)Earth Sciences, University of Hawaii, 1680 East-West Rd., POST 813, Honolulu, HI 96822, (2)Institute of Geology, University of Innsbruck, Innrain 52, Innsbruck, 6020, Austria
1:50 PM
FOREARC AND FORELAND BASIN EVIDENCE FOR PROTRACTED LATE CRETACEOUS-EOCENE COLLISION IN WESTERN ANATOLIA
MUELLER, Megan1, LICHT, Alexis2, CAMPBELL, Clay3, OCAKOGLU, Faruk4, BEARD, K. Christopher5, MÖLLER, Andreas6, AKSIT, Gui7, METAIS, Gregoire8, LOWERY, Kyle9, SHEKUT, Samuel10, COSTER, Pauline11 and TAYLOR, Michael H.3, (1)Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, (2)Aix-Marseille Université, CNRS, Centre de Recherche et d’Enseignement de Géosciences de l’Environnement (CEREGE), Aix-en-Provence, 13545, France, (3)Department of Geology, University of Kansas, Lawrence, KS 66045, (4)Department of Geological Engineering, Eskisehir Osmangazi University, Eskisehir, 26480, Turkey, (5)Ecology & Evolutionary Biology, University of Kansas, Lawrence, KS 66045, (6)Department of Geology, University of Kansas, Ritchie Hall, Earth, Energy, and Environment Center, 1414 Naismith Dr Room 254, Lawrence, KS 66045, (7)Department of Earth Sciences, University of Oregon, Eugene, OR 97403, (8)Centre de Recherches sur la Paléobiodiversité et les Paléoenvironnements, Muséum National d'Histoire Naturelle, Paris, 75005, France, (9)Seattle, WA 98103, (10)Earth and Space Science, University of Washington, 4000 15th Ave NE, Seattle, WA 98195, (11)Réserve naturelle nationale géologique du Luberon, Apt, 84400, France
2:05 PM
TERRANES, SPREADING RIDGES, AND OCEANIC PLATEAUS – A TALE OF THE SOUTH-CENTRAL ALASKAN FOREARC (Invited Presentation)
FINZEL, Emily, University of IowaEarth & Environmental Sciences, 115 Trowbridge Hall, Iowa City, IA 52242, ENKELMANN, Eva, Department of Geoscience, University of Calgary, Earth Sciences 118, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada, RIDGWAY, Kenneth D., Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907, TROP, Jeffrey M., Department of Geology and Environmental Geosciences, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837 and MCCLELLAND, William C., Department of Earth and Environmental Sciences, University of Iowa, Iowa City, IA 52242
2:25 PM
EVOLUTION OF THE CASCADIA FOREARC, OREGON AND WASHINGTON (Invited Presentation)
WELLS, Ray, U.S. Geological Survey, 2130 SW 5th Ave, Portland, OR 97201 and NIEM, Alan, CEOAS, Oregon State University, Corvallis, OR 97331
2:45 PM
TECTONOSTRATIGRAPHIC EVOLUTION OF SW OREGON FROM EARLY EOCENE COLLISION OF SILETZIA TO THE MODERN CASCADIA CONVERGENT MARGIN
DORSEY, Rebecca J., Department of Earth Sciences, University of Oregon, Eugene, OR 97403, DARIN, Michael, Nevada Bureau of Mines & Geology, University of Nevada, Reno, 1664 N. Virginia St, MS 0178, Reno, NV 89557-0178, ARMENTROUT, John, Earth Sciences -- Research Associate (not faculty), University of Oregon, 20060 SE Highway 224, Damascus, OR 97089, SANTRA, Manasij, Univ of Texas, Austin, Institute for Geophysics, 4327 Lasker Brook ct, Katy, TX 77494, BLACKWELL, David L.S., Department of Earth Sciences, University of Oregon, Eugene, OR 97403-1272 and BINDEMAN, Ilya, Earth Sciences, University of Oregon, Eugene, OR 97403
3:00 PM
PALEOGEOGRAPHY OF THE MIDDLE EOCENE TYEE GROUP, COAST RANGE OF OREGON, USA
SANTRA, Manasij, Univ of Texas, Austin, Institute for Geophysics, 4327 Lasker Brook ct, Katy, TX 77494, DARIN, Michael, Nevada Bureau of Mines and Geology, University of Nevada, Reno, Univeristy of Nevada Reno 178, Reno, NV 89557, DORSEY, Rebecca J., Department of Earth Sciences, University of Oregon, Eugene, OR 97403 and ARMENTROUT, John, Earth Sciences, University of Oregon -- Research Associate, 20060 SE Highway 224, Damascus, OR 97089
 
3:15 PM
Break
3:30 PM
INITIATION AND CENOZOIC EVOLUTION OF THE CASCADIA FOREARC BASIN: MULTIDISCIPLINARY EVIDENCE FROM THE COOS BAY AREA CENOZOIC STRATIGRAPHY, SOUTHWESTERN OREGON (Invited Presentation)
ARMENTROUT, John, Earth Sciences, University of Oregon -- Research Associate, 20060 SE Highway 224, Damascus, OR 97089, BLACKWELL, David L.S., Earth Sciences, University of Oregon, Eugene, OR 97403, THOMPSON, Laird B., Utah State University, 77 Garibaldi Street, Lake Oswego, OR 97035, DARIN, Michael, Nevada Bureau of Mines and Geology, University of Nevada, Reno, Univeristy of Nevada Reno 178, Reno, NV 89557, MCDOUGALL, Kristin, U.S. Geological Survey, GMEG Science Center, 2255 N. Gemini Drive, Flagstaff, AZ 86001, WELDON, Ray, Department of Geological Sciences, University of Oregon, Eugene, OR 97403 and BOGUE, Scott, Occidental College, 1600 Campus Road, Los Angeles, CA 90041
3:50 PM
LATE OLIGOCENE UPLIFT, INVERSION AND EMERGENCE OF THE CASCADIA FOREARC BASIN, SOUTHERN OREGON COAST RANGE, USA
DARIN, Michael, Nevada Bureau of Mines & Geology, University of Nevada, Reno, 1664 N. Virginia St, MS 0178, Reno, NV 89557-0178, ARMENTROUT, John, Earth Sciences -- Research Associate (not faculty), University of Oregon, 20060 SE Highway 224, Damascus, OR 97089 and DORSEY, Rebecca J., Department of Earth Sciences, University of Oregon, Eugene, OR 97403
4:05 PM
SEARCHING FOR YELLOWSTONE PLUME VS. CASCADE ARC SIGNATURES IN 49-30 MA BASALTIC AND RHYOLITIC ROCKS OF WESTERN OREGON
BINDEMAN, Ilya, Earth Sciences, University of Oregon, Eugene, OR 97403, LACKEY, Jade Star, Department of Geology, Pomona College, Claremont, CA 91711, JICHA, Brian, University of Wisconsin–Madison, COLON, Dylan, Department of Earth Sciences, University of Geneva, Geneva, ND 1205 and ARMENTROUT, John, Earth Sciences, University of Oregon -- Research Associate, 20060 SE Highway 224, Damascus, OR 97089
4:20 PM
COMBINING ORGANIC PETROGRAPHY, PALYNOMORPH ASSEMBLAGES AND LITHOLOGIC OBSERVATIONS TO RECONSTRUCT THE PALEOENVIRONMENT OF THE COOS BAY BASIN, SOUTHWEST OREGON, USA
BARBATO, Allison, Department of Geology and Geophysics & Museum of Natural Science, Louisiana State University, E235 Howe Russell Kniffen, Baton Rouge, LA 70808, WARNY, Sophie, Department of Geology and Geophysics, and Museum of Natural Science Baton Rouge, USA, Louisiana State University, E235 Howe-Russell Geoscience Complex, Baton Rouge, LA 70803, DEMCHUK, Thomas D., Petrostrat Inc., 1544 Sawdust Road, Suite 506, The Woodlands, TX 77380 and ARMENTROUT, John, Earth Sciences -- Research Associate (not faculty), University of Oregon, 20060 SE Highway 224, Damascus, OR 97089
4:35 PM
THE SPATIAL AND TEMPORAL EVOLUTION OF THE PORTLAND AND TUALATIN FOREARC BASINS, OREGON, USA
SCANLON, Darby1, BERSHAW, John2, WELLS, Ray2 and STREIG, Ashley R.2, (1)Chevron Corporation, 9525 Camino Media, Bakersfield, CA 93311, (2)Department of Geology, Portland State University, 1721 SW Broadway Ave, Portland, OR 97201
 
4:50 PM
Discussion
See more of: Technical Sessions