Cordilleran Section (104th Annual) and Rocky Mountain Section (60th Annual) Joint Meeting (19–21 March 2008)
Session No. 19 Thursday, 20 March 2008
1:30 PM-6:00 PM, University of Nevada-Las Vegas: Student Union 209

T1. Driving Mechanisms and Structural Styles of Synconvergent Extension

John P. Platt, Michael L. Wells and Thomas D. Hoisch, Presiding
 Paper #Start Time
 1:30 PM Introductory Remarks
19-11:35 PM SYNCONVERGENT EXTENSION IS DRIVEN BY SUBDUCTION: HAMILTON, Warren B., Department of Geophysics, Colorado School of Mines, Golden, CO 80401, whamilto@mines.edu
19-21:55 PM Paper Withdrawn
19-32:15 PM PROTRACTED BROADLY OROGEN-PARALLEL STRETCHING IN AN ARC DURING SUBDUCTION, NORTH CASCADES, WASHINGTON: MILLER, Robert B.1, PATERSON, Scott R.2, GORDON, Stacia3, MICHELS, Z.D.4, SHEA, E.K.4, and WINTZER, Niki E.1, (1) Dept Geology, San Jose State University, 1 Washington Sq, San Jose, CA 95192-0102, rmiller@geosun.sjsu.edu, (2) Department of Earth Sciences, 3651 Trousdale Parkway, Los Angeles, CA 90089, (3) Department of Geology & Geophysics, Univ of Minnesota, Minneapolis, MN 55455, (4) Geology, San Jose State University, One Washington Square, San Jose, CA 95192-0102
19-42:35 PM OROGEN-PARALLEL FLOW IN THE SOUTHERN SKAGIT GNEISS COMPLEX, NORTH CASCADES, WASHINGTON: SHEA, E.K. and MILLER, R.B., Department of Geology, San Jose State University, One Washington Square, San Jose, CA 95192-0102, ekshea@alum.mit.edu
19-52:55 PM SYNCONVERGENT EXTENSION IN THE PERUVIAN ANDES ABOVE A MODERN-DAY FLAT SLAB: MCNULTY, Brendan, Earth Science Dept, California State University Dominguez Hills, 1000 E. Victoria Street, Carson, CA 90747, bmcnulty@csudh.edu, FARBER, Daniel, Lawrence Livermore National Laboratory, Institute of Geophysics and Planetary Physics, 7000 East Avenue, Livermore, CA 94550, HORTON, Brian K., Institute for Geophysics and Department of Geological Sciences, University of Texas at Austin, Austin, TX 78712, GROVE, Marty, Department of Earth and Space Sciences, University of California-Los Angeles, Los Angeles, CA 90095-1567, and GIOVANNI, Melissa K., Department of Geoscience, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
19-63:15 PM TECTONIC AND THERMAL EVOLUTION OF THE CORDILLERA BLANCA DETACHMENT SYSTEM, PERUVIAN ANDES: IMPLICATIONS FOR NORMAL FAULTING IN A CONTRACTIONAL OROGEN: GIOVANNI, Melissa K., Department of Geoscience, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada, mkgiovan@ucalgary.ca, HORTON, Brian K., Department of Geological Sciences, University of Texas at Austin, 1 University Station C1100, Austin, TX 78712, GROVE, Marty, Department of Earth and Space Sciences, University of California-Los Angeles, Los Angeles, CA 90095-1567, and MCNULTY, Brendan, Earth Science Dept, California State University Dominguez Hills, 1000 E. Victoria Street, Carson, CA 90747
 3:35 PM Break
19-73:55 PM EXTENSION DURING ACTIVE COLLISION IN THIN-SKINNED WEDGES: INSIGHTS FROM LABORATORY EXPERIMENTS: HAQ, Saad S.B., Department of Earth and Atmospheric Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47906, shaq@purdue.edu and DAVIS, Dan M., Dept. of Geosciences, Stony Brook Univ, Stony Brook, NY 11794-2100
19-84:15 PM INFLUENCE OF THE MARIA FOLD AND THRUST BELT ON STYLES OF OLIGO-MIOCENE EXTENSION IN WESTERN ARIZONA: APPLICATION OF CRITICAL-TAPER THEORY: SPENCER, Jon E., Arizona Geological Survey, 416 W. Congress St., #100, Tucson, AZ 85704, jon.spencer@azgs.az.gov and RICHARD, Stephen M., Arizona Geological Survey, 416 W. Congress, #100, Tucson, AZ 85701-1381
19-94:35 PM MULTIPLE TRIGGERS FOR MULTIPLE EPISODES OF SYNCONVERGENT EXTENSION IN THE SEVIER HINTERLAND: WELLS, Michael L., Dept. of Geoscience, Univ of Nevada, Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154-4010, michael.wells@unlv.edu and HOISCH, Thomas D., Geology, Northern Arizona Univ, Box 4099, Flagstaff, AZ 86011
19-104:55 PM TEXTURAL EVIDENCE FROM GARNET SCHIST FOR A MAJOR SYNCONVERGENT EXHUMATION EVENT IN THE HINTERLAND OF THE SEVIER OROGENIC BELT: HOISCH, Thomas D., Department of Geology, Northern Arizona University, Box 4099, Flagstaff, AZ 86011, thomas.hoisch@nau.edu and WELLS, Michael L., Dept. of Geoscience, Univ of Nevada, Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154-4010
19-115:15 PM THERMOBAROMETRIC CONSTRAINTS ON THE TECTONIC EVOLUTION OF THE NORTHERN SNAKE RANGE METAMORPHIC CORE COMPLEX, EASTERN NEVADA: COOPER, Frances J. and PLATT, John P., Department of Earth Sciences, University of Southern California, Zumberge Hall of Science, 3651 Trousdale Parkway, Los Angeles, CA 90089-0740, fcooper@usc.edu
19-125:35 PM THE ESPIRITU CANYON SHEAR ZONE IN THE FOOTWALL OF THE SAN PEDRO – CATALINA DETACHMENT FAULT EAST OF TUCSON, ARIZONA: AN EXHUMED, DEEP-SEATED SEGMENT OF THE SAN XAVIER DETACHMENT FAULT?: RICHARD, Stephen M., Arizona Geological Survey, 416 W. Congress, #100, Tucson, AZ 85701-1381, steve.richard@azgs.az.gov, SPENCER, Jon E., Arizona Geological Survey, 416 W. Congress St., #100, Tucson, AZ 85704, and BYKERK-KAUFFMAN, Ann, Geological and Environmental Sciences, California State Univ, Chico, 400 W. 1st St, Chico, CA 95929-0205
 5:55 PM Concluding Remarks

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