Session No. 12 Tuesday, April 1, 2003

2:15 PM-5:30 PM, Hotel NH Krystal: Jalisco A
S1. Tectonics, Structure, and Geophysics of the Gulf of California–Salton Trough Region II
Arturo Martin and Gary Axen, Presiding
 Paper #Start Time
12-12:15 PM STRUCTURAL AND MAGMATIC EVOLUTION OF THE SONORAN RIFTED MARGIN: A PRELIMINARY REPORT: GANS, Phillip B.1, BLAIR, K.1, MACMILLAN, I.1, WONG, M.1, and ROLDAN, J.2, (1) Geological Sciences, UCSB, Santa Barbara, CA 93106, gans@geol.ucsb.edu, (2) UNAM-CRN, Hermosillo, Mexico
12-22:35 PM TIMING, MAGNITUDE, AND RATE OF EXTENSIONAL UNROOFING AT THE SIERRA MAZATAN METAMORPHIC CORE COMPLEX, SONORA, MEXICO: RESULTS FROM 40AR/39AR THERMOCHRONOLOGY: WONG, Martin S., Department of Geological Sciences, Univ of California, Santa Barbara, Building 526, Santa Barbara, CA 93106-9630, mwong@umail.ucsb.edu, GANS, Phillip B., Department of Geological Sciences, Univ of California, Santa Barbara, CA 93106-9630, and ROLDÁN-QUINTANA, Jaime, Instituto de Geologia, Estacion Regional del Noroeste, Universidad National Autonoma de Mexico, Apartado Postal 1039, Hermosillo, 83000, Mexico
12-32:55 PM TECTONIC IMPLICATIONS OF ABANDONED AND ACTIVE BASIN ARCHITECTURE IN THE NORTHERN GULF OF CALIFORNIA RIFT: ARAGON-ARREOLA, Manuel1, MARTÍN-BARAJAS, Arturo1, and STOCK, Joann M.2, (1) Departamento de Geologia, CICESE, Km. 107 Carretera Tijuana-Ensenada, Apartado Postal 2732, Ensenada, B.C, C.P. 22860, Mexico, maragon@cicese.mx, (2) Seismological Laboratory, California Institute of Technology, M/C 252-21, 1200 East California Blvd, Pasadena, CA 91125
12-43:15 PM STRUCTURE AND TECTONIC OF THE WAGNER BASIN IN THE GULF OF CALIFORNIA USING MULTICHANNEL SEISMIC REFLECTION PROFILES: HURTADO, A.D.A.1, MARTIN-BARAJAS, A.1, GONZALEZ, A.F.1, CONTRERAS, J.P.1, and MORTERA, C.G.2, (1) Ciencias de la Tierra - Geologia, CICESE, km 107 carretera Tijuana - Ensenada, Ensenada, B.C, 22860, Mexico, adhurtado@yahoo.com, (2) Sismologia, Instituto de Geofisica - UNAM, Ciudad Universitaria - Circuito Interior, Mexico, D.F, 04510, Mexico
 3:35 PM Discussion
 3:50 PM Break
12-54:05 PM ANOMALOUS CRUSTAL DEFORMATION IN NORTHEASTERN BAJA AND MEXICALI VALLEY: BENNETT, Richard A., Harvard-Smithaonian Ctr for Astrophysics, 60 Garden Street, MS 42, Cambridge, MA 02138, rbennett@cfa.harvard.edu and GONZALEZ GARCIA, Javier, CICESE, Ensenada, Baja California, Mexico
12-64:25 PM ONE DECADE OF INTERSEISMIC GPS OBSERVATIONS OVER THE PACIFIC-NORTH AMERICA PLATE BOUNDARY AT THE LATITUDE OF THE HEAD OF THE GULF OF CALIFORNIA: GONZALEZ-GARCIA, J. Javier Sr, Seismology, Earth Sciences Division, Centro de Investigacion Cientifica y de Educacion Superior de Ensenada, km 107 carretera Tijuana-Ensenada, Ensenada, Baja California 22860 Mexico, javier@cicese.mx.
12-74:45 PM STRAIN TRANSFER ACROSS THE TRANSTENSIVE IMPERIAL AND MEXICALI VALLEYS OF SOUTHERN CALIFORNIA AND NORTHERN BAJA CALIFORNIA, MEXICO: TRANSITION FROM EXTENSION TO STRIKE-SLIP DOMAINS AND IMPLICATIONS FOR PATTERNS OF EARTHQUAKE GENERATION: ROCKWELL, Thomas K., Department of Geological Sciences, San Diego State Univ, San Diego, CA 92182-1020, trockwell@geology.sdsu.edu.
12-85:05 PM LATE PLEISTOCENE SLIP RATE ON THE COACHELLA VALLEY SEGMENT OF THE SAN ANDREAS FAULT AND IMPLICATIONS FOR REGIONAL SLIP PARTITIONING: DORSEY, Rebecca J., Dept. of Geological Sciences, 1272 University of Oregon, Eugene, OR 97403-1272, rdorsey@darkwing.uoregon.edu.
 5:25 PM Concluding Remarks

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