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GSA Annual Meeting in Seattle, Washington, USA - 2017

Session No. 390
Wednesday, 25 October 2017: 9:00 AM-6:30 PM
Halls 4EF (Washington State Convention Center)

T229. Paleocene-Eocene Tectonic and Magmatic Evolution of the Pacific Northwest (Posters)

GSA Structural Geology and Tectonics Division; GSA Sedimentary Geology Division; GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division
Authors will be present from 2 to 4 PM and 4:30 to 6:30 PM.
390-1
451
EOCENE LAMPROPHYRIC DIKES FROM NORTHERN IDAHO AND NORTHEASTERN WASHINGTON
BUDDINGTON, A.M., Science Department, Spokane Community College, 1810 N. Greene St., Spokane, WA 99217, STEVEN, Cody J., Geological Sciences, University of Idaho, Moscow, ID 83844 and TIKOFF, Basil, Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton St, Madison, WI 53706, andy.buddington@scc.spokane.edu
390-2
452
PETROLOGY, GEOCHRONOLOGY, AND TECTONIC IMPLICATIONS OF THE EOCENE NACHES FORMATION, CENTRAL CASCADES, WASHINGTON
KIMLER, Thomas David, Geology, University of Puget Sound, Tacoma, WA 98416 and TEPPER, Jeffery H., Geology Department, University of Puget Sound, 1500 N. Warner #1048, Tacoma, WA 98416, Tkimler@pugetsound.edu
390-3
453
MID-EOCENE ARC VOLCANISM IN CENTRAL WASHINGTON CASCADES: PETROLOGY OF THE TANEUM FORMATION AND ITS RELATION TO FARALLON PLATE SUBDUCTION AND BREAKOFF
WALLENBROCK, Cameron J., Department of Geology, University of Puget Sound, 1500 N. Warner St., Tacoma, WA 98416 and TEPPER, Jeffrey H., Department of Geology, University of Puget Sound, Tacoma, WA 98416, cwallenbrock@pugetsound.edu
390-4
454
PETROLOGY AND GEOCHRONOLOGY OF THE EOCENE BASALT OF FROST MOUNTAIN: THOLEIITIC VOLCANISM IN THE CENTRAL CASCADES, WASHINGTON
RANDALL, John A., Geology, University of Puget Sound, 1500 N Warner, Tacoma, WA 98416, randall.john95@gmail.com
390-5
455
DECIPHERING CRETACEOUS AND EOCENE GRANITOIDS IN THE SPOKANE AREA, EASTERN WASHINGTON
LARSON, Kristine and PRITCHARD, Chad J., Department of Geology, Eastern Washington University, 130 Science Building, Cheney, WA 99004-2439, kristmlar@gmail.com
390-6
456
MINERAL CHEMISTRY OF THE CAMAS LAND DIABASE, CENTRAL CASCADES, WASHINGTON: A SILL WITHIN THE EOCENE CHUMSTICK FORMATION
EASTERBROOK, Madison A. and MACDONALD Jr., James H., Marine & Ecological Sciences, Florida Gulf Coast University, 10501 FGCU Blvd South, Ft. Myers, FL 33965, maeasterbrook2025@eagle.fgcu.edu
390-7
457
MINERAL GEOCHEMISTRY AND GEOTHERMOBAROMETRY OF THE EOCENE GRANITE FALLS STOCK, BALD MOUNTAIN PLUTON, AND MOUNT PILCHUCK STOCK, WASHINGTON STATE
THOMPSON, Glenn T.1, MACDONALD Jr., James H.1, DRAGOVICH, Joe D.2 and TEPPER, Jeffrey H.3, (1)Marine & Ecological Sciences, Florida Gulf Coast University, 10501 FGCU Blvd South, Ft. Myers, FL 33965, (2)Associated Earth Sciences, Inc., 1552 Commerce Street, Suite 102, Tacoma, WA 98402, (3)Department of Geology, University of Puget Sound, Tacoma, WA 98416, gtthompson6147@eagle.fgcu.edu
390-8
458
GRANITE FALLS STOCK AND THE HANSEN LAKE RHYOLITE—A HISTORY OF SYN-TECTONIC EOCENE MAGMATISM AND UPLIFT IN THE PILCHUCK RIVER VALLEY DURING REGIONAL TRANSTENSION, SNOHOMISH COUNTY, WASHINGTON
DRAGOVICH, Joe D.1, TEPPER, Jeffrey H.2, MACDONALD Jr., James H.3, DUFRANE, S. Andrew4, ANDERSON, Megan L.5, KOGER, Curtis J.6, MAVOR, Skyler7, THOMPSON, Glenn T.3 and EDDY, Michael P.8, (1)Associated Earth Sciences, Inc., 1552 Commerce Street, Suite 102, Tacoma, WA 98402, (2)Department of Geology, University of Puget Sound, Tacoma, WA 98416, (3)Marine & Ecological Sciences, Florida Gulf Coast University, 10501 FGCU Blvd South, Ft. Myers, FL 33965, (4)Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Science Building, Edmonton, AB T6G 2E3, Canada, (5)Geology Department, Colorado College, 14 E. Cache La Poudre St, Colorado Springs, CO 80903, (6)Associated Earth Sciences, Inc., 911 5th Ave., Suite 100, Kirkland, WA 98033, (7)Department of Geosciences, Colorado State University, 1401 Campus Delivery, Ft. Collins, CO 80523, (8)Department of Geosciences, Princeton University, Princeton, NJ 08544, jdragovich@aesgeo.com
Handouts
  • GSA_TERTIARY_SESSION_ Dragovich_Final.pdf (8.7 MB)
  • GSA_TERTIARY_SESSION_ Dragovich_Final.pptx (10.8 MB)
  • ger_ms2016-03_geol_map_granite_falls_24k.pdf (3.2 MB)
  • ger_ms2016-03_geol_map_granite_falls_24k_pamphlet.pdf (7.6 MB)
    • 390-9
    459
    STRATIGRAPHIC RECORD OF THE MIDDLE EOCENE FAULT-BEND, STRIKE-SLIP CHUMSTICK BASIN, CENTRAL WASHINGTON, SYNCHRONOUS WITH AN EPISODE OF MAJOR STRIKE-SLIP FAULTING ACROSS THE CASCADES
    UMHOEFER, Paul J.1, DONAGHY, Erin E.1, EDDY, Michael P.2 and MILLER, Robert B.3, (1)School of Earth Sciences and Environmental Sustainability, Northern Arizona University, 625 Knoles Drive, Box 4099, Flagstaff, AZ 86011, (2)Department of Geosciences, Princeton University, Princeton, NJ 08544, (3)Geology, San Jose State University, One Washington Square, San Jose, CA 95192, paul.umhoefer@nau.edu
    390-10
    460
    A MASSIVE “CHALLIS” EPISODE HYDROTHERMAL SYSTEM IN SOUTH-CENTRAL BRITISH COLUMBIA: STABLE ISOTOPE EVIDENCE FROM THE CORYELL INTRUSIVE SUITE AND PENTICTON VOLCANICS
    HOLK, Gregory J.1, MCCARTHY, Anne1 and MALLORY, Marci2, (1)Department of Geological Sciences and IIRMES, California State Univ Long Beach, 1250 Bellflower Blvd, Long Beach, CA 90840, (2)Gente Oil, Bakersfield, CA 93309, gholk@csulb.edu
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