Geological Society of America

8:00 AM

LITHOSPHERE AND ASTHENOSPHERE MAGMA SOURCES IN THE RIO GRANDE RIFT - INSIGHTS FROM GEODYNAMIC MODELS

Dennis Harry, Colorado State University, Fort Collins, CO and Micah Mayle, Colorado State University, Fort Collins, CO and Eli Crocker, Colorado State University, Fort Collins, CO

388064 (Theme Sessions)

8:20 AM

DECONSTRUCTING THE EVOLUTIONARY HISTORY OF SUMMER COON VOLCANO, COLORADO: EVIDENCE FROM GEOCHEMISTRY AND RADIOGENIC ISOTOPES

Gregory J. Stark, University of Wyoming, Laramie, WY and Kenneth Sims, University of Wyoming, Laramie, WY

386507 (Theme Sessions)

8:40 AM

MAGMA MIXING IN THE HINSDALE MAGMATIC SYSTEM, NORTHERN RIO GRANDE RIFT IN SOUTHERN COLORADO AND NORTHERN NEW MEXICO, USA

Amy Gilmer, Geosciences and Environmental Change Science Center, Denver, CO and Ren Thompson, U.S. Geological Survey, Denver, CO and Kenzie Turner, U.S. Geological Survey, Denver, CO and Leah Morgan, Geology, Geophysics, and Geochemistry Science Center, Denver, CO

388010 (Theme Sessions)

9:00 AM

THE JEMEZ MOUNTAINS VOLCANIC FIELD (JMVF): A PETROLOGIC HISTORY

John Wolff, Washington State University, Pullman, WA and Frank Ramos, New Mexico State University, Las Cruces, NM and Michael C. Rowe, University of Auckland, Auckland and Jie Wu, University of Auckland, Auckland and Joseph R. Boro, Washington State University, Pullman, WA and Stephen Self, University of California, Berkeley, Berkeley, CA

387923 (Theme Sessions)

9:20 AM

EVIDENCE FROM VOLCANIC ROCK XENOCRYSTS FOR ONSET OF EXTENSIONAL TECTONISM IN NORTHERNMOST RIO GRANDE RIFT SYSTEM, COLORADO

G. Lang Farmer, University of Colorado, Boulder, CO and Eric T. Ellison, University of Colorado, Boulder, CO and Aaron Bell, University of Colorado Boulder, Boulder, CO

387817 (Theme Sessions)

9:40 AM

CENOZOIC METAMORPHISM AND ALONG-STRIKE PEAK TEMPERATURES IN THE PENNSYLVANIAN MINTURN FORMATION IN THE SANGRE DE CRISTO RANGE: UNRAVELING THE COMPLEX THERMAL HISTORY OF THE RIO GRANDE RIFT IN SOUTHERN COLORADO

Samantha Malavarca, Colorado State University, Fort Collins, CO and John Singleton, Colorado State University, Fort Collins, CO and Michael Sitar, Colorado State University, Fort Collins, MA and Jeffrey Rahl, Washington and Lee University, Lexington, VA and J.F. Magloughlin, Colorado State University, Fort Collins, CO

387928 (Theme Sessions)

10:00 AM

TECTONIC EVOLUTION OF THE NORTHERN SANGRE DE CRISTO MOUNTAINS, COLORADO, USA

David A. Lindsey, Denver, CO and Jonathan Caine, Denver, CO

387686 (Theme Sessions)

10:20 AM

LATE OLIGOCENE TO EARLY MIOCENE EXTENSIONAL REACTIVATION OF THE INDEPENDENCE MINE SHEAR ZONE IN THE SANGRE DE CRISTO RANGE, SOUTHERN COLORADO

Michael Sitar, Colorado State University, Fort Collins, CO and John Singleton, Colorado State University, Fort Collins, CO and Jeffrey Rahl, Washington and Lee University, Lexington, VA and Jonathan Caine, Geology, Geophysics, and Geochemistry Science Center, Denver, CO and Jacob King, Colorado State University, Fort Collins, CO

387914 (Theme Sessions)

10:40 AM

REFINING THE PRE- AND SYN-RIO GRANDE RIFT COOLING HISTORY ACROSS THE SANGRE DE CRISTO RANGE AND ALVARADO FAULT THROUGH APPLICATION OF MID- TO LOW-TEMPERATURE THERMOCHRONOMETRY

Omar Ghamedi, Colorado State University, Fort Collins, CO and John Singleton, Colorado State University, Fort Collins, CO and Michael Sitar, Colorado State University, Fort Collins, MA and Jeffrey Rahl, Washington and Lee University, Lexington, VA and Martin Wong, Colgate University, Hamilton, NY and Paul O'Sullivan, Moscow, ID and Cece Hurtado, Colorado State University, Fort Collins, CO and Samantha Malavarca, Colorado State University, Fort Collins, CO

387970 (Theme Sessions)

11:00 AM

CONSTRAINING THE OLIGOCENE-MIOCENE TRANSITION FROM CLOSED BASIN RIFT SEDIMENTATION DURING THE EARLIEST STAGES OF THE ANCESTRAL RIO GRANDE FLUVIAL SYSTEM, SOUTH-CENTRAL NEW MEXICO

Ethan Schneider, New Mexico State University, Las Cruces, NM and Brian A. Hampton, New Mexico State University, Las Cruces, NM and Shay Ridl, University of Iowa, Iowa City, IA

388028 (Theme Sessions)

11:20 AM

A SHALLOW RIFT BASIN SEGMENTED IN SPACE AND TIME: THE SOUTHERN SAN LUIS BASIN, RIO GRANDE RIFT, NORTHERN NEW MEXICO

Benjamin Drenth, Geology, Geophysics, and Geochemistry Science Center, Denver, CO and V.J.S. Grauch, U.S. Geological Survey, Denver, CO and Kenzie Turner, Geosciences and Environmental Change Science Center, Denver, CO and Brian D. Rodriguez, U.S. Geological Survey, Denver, CO and Ren A. Thompson, Geosciences and Environmental Change Science Center, Denver, CO and Paul W. Bauer, New Mexico Bureau of Geology, Socorro, NM

387843 (Theme Sessions)

11:40 AM

INFLUENCE OF GLACIAL EROSION AND MELT ON THE SANGRE DE CRISTO NORMAL FAULT SYSTEM, SOUTHERN COLORADO

Cece Hurtado, Colorado State University, Fort Collins, CO and Sean Gallen, Colorado State University, Fort Collins, CO

387815 (Theme Sessions)

22 Tectonism and Magmatism in the Rio Grande Rift

Presentations