Session: What’s in a Fault? Fault Structure, Deformation Mechanisms, and Why Fault Zones Matter to Society: In Honor of James P. Evans (Posters) (GSA Connects 2023 Meeting in Pittsburgh, Pennsylvania)

Session No. 242

Wednesday, 18 October 2023: 8:00 AM-5:30 PM

Hall B (David L Lawrence Convention Center)

T82. What’s in a Fault? Fault Structure, Deformation Mechanisms, and Why Fault Zones Matter to Society: In Honor of James P. Evans (Posters)

GSA Structural Geology and Tectonics Division; GSA Environmental and Engineering Geology Division; GSA Hydrogeology Division

Authors will be present from 3:30 to 5:30 PM.

Paper #

Booth #

242-1

200

GROUNDWATER FLOW IN CRETACEOUS CARBONATES OF THE HIDDEN VALLEY FAULT ZONE, COMAL COUNTY, TEXAS

FERRILL, David¹, MCGINNIS, Ronald N.¹, WALTER, Gary R.², JOHNSON, Steven³, BERTETTI, F. Paul⁴, SMART, Kevin J.¹ and CAWOOD, Adam J.¹, (1)Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78238-5166, (2)Southwest Research Institute (retired), 6220 Culebra Road, San Antonio, TX 78238-5166, (3)Edwards Aquifer Authority (retired), San Antonio, TX 78215, (4)Edwards Aquifer Authority, 900 E. Quincy, San Antonio, TX 78215

242-2

201

INFLUENCES OF NETWORK MATURITY AND MEGABLOCK STRUCTURE ON FLUID FLOW AND SOLUTE TRANSPORT PROPERTIES OF VOLUMETRIC CONTRACTION FRACTURE NETWORKS

HONER, Justin¹, REEVES, Donald², AKARA, Mahawa-Essa Mabossani¹ and PARASHAR, Rishi³, (1)Department of Geological and Environmental Sciences, Western Michigan University, 1903 W Michigan Ave, Kalamazoo, MI 49008-5241, (2)Geological and Environmental Sciences, Western Michigan University, 1903 W Michigan Ave, Kalamazoo, MI 49008-5241, (3)Division of Hydrologic Sciences, Desert Research Institute, 2215 Raggio Parkway, Reno, MI 89512

242-3

202

ACTIVE SOURCE AND LABORATORY SEISMIC MEASUREMENTS ACROSS THE LITTLE GRAND WASH FAULT, UTAH: REGOLITH AND HOST ROCK INFLUENCES ON CO2 LEAKAGE:

LIBERTY, Lee¹, SKURTVEIT, Elin², YELTON, Jonathan¹, SLIVICKI, Stephen¹, SMITH, Scott Adam³, BRAATHEN, Alvar⁴, MIDTKANDAL, Ivar² and EVANS, James P.⁵, (1)Department of Geosciences, Boise State University, Boise, ID 83725, (2)Dept. of Geoscience, University of Oslo, Oslo, N-0316, Norway, (3)Norges Geotekniske Institutt, Postboks 3930 Ullevål Stadion, Oslo, 0806, Norway, (4)Department of Geosciences, University of Oslo, Sem Saelandsvei 1, Oslo, 0371, Norway, (5)Department of Geosciences, Utah State University, 4505 Old Main Hill, Logan, UT 84322

242-4

203

PRELIMINARY STRUCTURAL ANALYSIS OF THE CORONA DE ORO BELT IN NORTHWESTERN NICARAGUA WITH IMPLICATIONS FOR GOLD MINERALIZATION AND LATER STRUCTURAL MODIFICATION

SQUIRES, Bradley¹, FRIEMAN, Ben¹ and POWELL, Frank², (1)Department of Geology and Geological Engineering, Colorado School of Mines, Center for Advanced Subsurface Earth Resource Models, 1516 Illinois Street, Golden, CO 80401, (2)Mako Mining Corporation, 838 West Hastings St. STE 700, Vancouver, BC V6C 0A6, Canada

242-5

204

USING EFFECTIVE MEDIUM THEORY TO EXPLORE THE ROLE OF PRE-EXISTING CRACKS IN FAULT FORMATION

LAM, Ryann and CHOI, Eunseo, Center for Earthquake Research and Information, University of Memphis, 3890 Central Ave, Memphis, TN 38152

242-6

205

LIDAR MAPPING ILLUMINATES COMPLEXITY AND CONNECTIVITY OF EARTHQUAKE SOURCES: AN EXAMPLE FROM THE SAN ANDREAS PLATE BOUNDARY IN NORTHERN CALIFORNIA

HECKER, Suzanne, U.S. Geological Survey, PO Box 158, Moffett Field, CA 94035-0158

242-7

206

EXAMINING A NEW ROCK RECORD OF QUASI-STEADY CREEP IN THE COACHELLA SEGMENT OF THE SAN ANDREAS FAULT

TOBIN, Kate L.¹, WILLIAMS, Randolph¹, SONE, Hiroki² and TRZECIAK, Maciej², (1)Department of Geoscience, University of Wisconsin-Madison, Weeks Hall for Geologic Sciences, 1215 W. Dayton St, Madison, WI 53706, (2)Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Engineering Hall, 1415 Engineering Dr, Madison, WI 53706

242-8

207

ASSESSING SEISMIC RISK ON THE OHIO RIVER FAULT BETWEEN NEW MARTINSVILLE AND WAVERLY WEST VIRGINIA

MCGREW, Allen, Department of Geology and Environmental Geosciences, The University of Dayton, 300 College Park, Dayton, OH 45469-2364

242-9

208

FOLLOWING THE CRUMBS: NEW FIELD OBSERVATIONS, FAULT ROCKS, AND STRUCTURAL GEOLOGIC ANALYSES OF DISMEMBERED OPHIOLITE KLIPPEN IN THE ALASKA YUKON-TANANA UPLAND

CAINE, Jonathan¹, TODD, Erin², MCDERMOTT, Robert³ and JONES III, Jamey², (1)U.S. Geological Survey, PO Box 25046, BLDG 20 MS 964, Denver, CO 80225-0046, (2)U.S. Geological Survey, Alaska Science Center, 4210 University Drive, Anchorage, AK 99508, (3)U.S. Geological Survey, Alaska Science Center, Anchorage, AK 99508

242-10

209

TECTONIC SIGNIFICANCE AND FORMATION PROCESSES OF PSEUDOTACHYLITE NEAR JUNE LAKE, CA

HART, Olivia, Department of Geological Sciences and Engineering, University of Nevada, Reno, 1664 N. Virginia Street, MS 0172, Reno, NV 89557-0001 and CAO, Wenrong, Department of Geological Sciences and Engineering, University of Nevada Reno, Reno, NV 89557-0001

242-11

210

⁴⁰AR/³⁹AR DATING AND PALEOMAGNETIC ANALYSES OF PSEUDOTACHYLYTE REVEAL A MINIMUM OF 2.97 MILLION YEARS OF LOW-ANGLE NORMAL FAULT SEISMICITY

GOODWIN, Laurel¹, HOEHN, Jack R.¹, LONGCHAMP, Max², SMITH, Dana M.¹, FEINBERG, Joshua², JICHA, Brian¹, SINGER, Bradley S.¹, HARRIGAN, Claire O.³ and FU, Roger R.⁴, (1)Geoscience, University of Wisconsin–Madison, Madison, WI 53706, (2)Institute for Rock Magnetism, University of Minnesota, Minneapolis, MN 55455, (3)Earth and Oceanographic Science, Bowdoin College, Brunswick, ME 04011, (4)Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138

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