Geological Society of America

8:30 AM

THE ACTIVE ANDEAN OROGENIC FRONT AT THE SOUTHERNMOST PAMPEAN FLAT-SLAB

Carlos H. Costa, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, N/A and Carlos E. Gardini, Universidad Nacional de San Luis-CONICET, San Luis, N/A and Hans Diederix, EZ Schalkhaar, N/A and Hector A. Cisneros, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, N/A and Emilio A. Ahumada, Universidad Nacional de San Luis-CONICET, San Luis, N/A

100389 (SUBMIT ABSTRACT)

8:50 AM

REFOLDING OF THIN-SKINNED THRUST SHEETS BY ACTIVE BASEMENT-INVOLVED THRUST FAULTS IN THE EASTERN PRECORDILLERA OF WESTERN ARGENTINA

Andrew Meigs, Oregon State University, Corvallis, OR and William C. Krugh, Institute of Geology, Zurich, N/A and Celia Schiffman, Oregon State Univ, Corvallis, OR and Jaume M. Verges, Inst Ciencias de la Terra, Barcelona and Victor A. Ramos, Universidad de Buenos Aires, Buenos Aires, N/A

101160 (SUBMIT ABSTRACT)

9:10 AM

ON RECURRENT RIFTING AND SYNPLUTONIC HEALING OF THE CHILEAN-ARGENTINIAN ANDEAN BACKBONE

Estanislao Godoy, Servicio Nacional de Geologia y Minería, Santiago, N/A

101117 (SUBMIT ABSTRACT)

9:30 AM

CENOZOIC EXTENSION VS. COMPRESSION IN THE CENTRAL NEUQUEN BASIN (S37° - S36°, ARGENTINA)

Guillaume Backé, Université de Pau et des Pays de l'Adour, pau, N/A and Yves Hervouët, Université de Pau et des Pays de l'Adour, pau, N/A and Damien Dhont, Université de Pau et des Pays de l'Adour, pau, N/A

99439 (SUBMIT ABSTRACT)

9:50 AM

CRUSTAL COLLAPSE IN THE SOUTHERN ANDES AFTER SHALLOW SUBDUCTION (34º30-40º30S)

Andres Folguera, Universidad de Buenos Aires, Buenos Aires, N/A and Vanesa D. Litvak, Universidad de Buenos Aires, Buenos Aires, N/A and Ezequiel Garcia Morabito, Universidad de Buenos Aires, Buenos Aires, N/A and Victor A. Ramos, Universidad de Buenos Aires, Buenos Aires, N/A and Germán L. Bottesi, Repsol YPF, Buenos Aires, N/A and Tomas Zapata, Repsol YPF, Buenos Aires, N/A

99717 (SUBMIT ABSTRACT)

10:30 AM

TECTOGENIC SEDIMENT DISPERSAL FROM RETROARC FORELAND OROGENIC WEDGES: EXAMPLES FROM THE CORDILLERA OF NORTH AND SOUTH AMERICA

James G. Schmitt, Montana State University, Bozeman, MT and Carlos H. Costa, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, N/A

101359 (SUBMIT ABSTRACT)

10:50 AM

THE CRUSTAL STRUCTURE OF THE BROOKS RANGE OROGENIC BELT—THE BACKBONE OF ALASKA

Thomas E. Moore, U.S. Geological Survey, Menlo Park, CA and Gary Fuis, La Honda, CA and Christopher Potter, Bound Brook, NJ and Paul O'Sullivan, Apatite to Zircon, Inc, Viola, ID

101405 (SUBMIT ABSTRACT)

11:10 AM

BASEMENT-INVOLVED FORELAND DEFORMATION IN NORTHEASTERN ALASKA—STRUCTURAL STYLE, CORDILLERAN ANALOGS, AND TECTONIC DRIVERS

Christopher J. Potter, U.S. Geological Survey, Denver, CO and Thomas Moore, U.S. Geological Survey, Menlo Park, CA and Paul O'Sullivan, Apatite to Zircon, Inc, Viola, ID

101407 (SUBMIT ABSTRACT)

11:30 AM

WHAT FLAT-SLAB SUBDUCTIONS CAN DO: AN EXAMPLE FROM MESOZOIC SOUTH CHINA

Zheng-Xiang Li, The University of Western Australia, Crawley, WA, N/A and Xian-Hua Li, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, N/A

99154 (SUBMIT ABSTRACT)

11:50 AM

TECTONIC SHUFFLE ZONES: LITHOSPHERE-SCALE MOVEMENT ZONES THAT REVERSE THEIR SHEAR SENSE DURING OROGENESIS

Marnie Forster, The Australian National University, Canberra, N/A and Gordon Lister, The Australian National University, Canberra, N/A

99613 (SUBMIT ABSTRACT)

12:10 PM

GONDWANAN - SOUTH AMERICAN CONNECTIONS IN TACONIAN, ACADIAN-CALEDONIAN, AND YOUNGER OROGENIC RECORDS IN THE NORTHERN APPALACHIANS AND NORWEGIAN CALEDONIDES (II)

Peter Robinson, Geol Survey of Norway, Trondheim, N/A and Øystein Nordgulen, Geol Survey of Norway, Trondheim, N/A and Robert D. Tucker, Washington Univ, St Louis, MO and Kurt T. Hollocher, Union College, Schenectady, NY and Peter J. Thompson, Univ of New Hampshire, Durham, NH and Henry N. Berry, Augusta, ME and Philip H. Osberg, N/A and Cees R. van Staal, Geol Survey of Canada, Ottawa, ON and Roberts David, Geol Survey of Norway, Trondheim, N/A and Victor A. Melezhik, Geol Survey of Norway, Trondheim, N/A

101243 (SUBMIT ABSTRACT)

15 T3. Shallowing and Steepening Subduction Zones IV

Presentations