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Abstracts Deadline: July 15, 2003

T140 top Modeling Metamorphism: Petrology, Geochemistry, and Tectonics
Mineralogical Society of America, Geochemical Society; GSA Structural Geology and Tectonics Division
Michael Brown, University of Maryland, College Park, MD; Barbara L. Dutrow, Louisiana State University, Baton Rouge, LA
This session encourages contributions from a wide variety of subdisciplines that use modeling to understand the petrology, geochemistry, and tectonics of lithosphere evolution: from nucleation and growth of crystals to orogenesis, from fluid flow to melting, and from quantifying extensive variables to understanding the rheology of metamorphic belts. ORAL and POSTER
Petrology, Metamorphic; Geochemistry, Other; Tectonics
T141 top Phase Relations, High P-T Terrains, P-T-ometry and Plate Pushing: A Tribute to W.G. Ernst
Mineralogical Society of America
Sorena S. Sorensen, Washington, D.C.; Mark Cloos, University of Texas, Austin, TX; M. Charles Gilbert, University of Oklahoma, Norman, OK
A Gary Ernst tribute: mineral and rock phase relations, field relations of high P-T, UHP, and arc terrains, subduction zone tectonics and evolution, plate tectonic synthesis of orogenic belts, and earth science writ large. ORAL and POSTER
Petrology, Metamorphic; Petrology, Igneous; Tectonics
T142 top Structure and Stratigraphy: New Perspectives on Lithotectonic Processes
GSA Structural Geology and Tectonics Division; GSA Sedimentary Geology Division
Mark P. Fischer, Northern Illinois University, De Kalb, IL; David Anastasio, Lehigh University, Bethlehem, PA
Variability in structures and structural processes are controlled by sedimentological and stratigraphic variables operating at multiple scales. Examples include fold and fault geometries, strain partitioning, and mesoscopic deformation patterns. This session showcases research that integrates structural and stratigraphic analyses. ORAL and POSTER
Structural Geology; Stratigraphy
T143 top Earthquake Geology in Reverse-Faulting Terrains
GSA Quaternary Geology and Geomorphology Division
Alan R. Nelson, U.S. Geological Survey, Denver, CO; Brian L. Sherrod, U.S. Geological Survey, Seattle, WA
Earthquake geology-study of the kinematics, history, and effects of earthquakes and related earth movements-requires diverse and innovative approaches in regions of active reverse faulting and folding. We encourage contributions about approaches and techniques applicable to the recently glaciated, heavily forested U.S. Pacific Northwest. ORAL and POSTER
Neotectonics/Paleoseismology; Quaternary Geology/Geomorphology; Structural Geology
T144 top Tectonics of the Circum-Pacific Rim in Space and Time: Focus on Alaska, Central and South America, and the Western Pacific
GSA International Division; U.S. National Committee on the Geological Sciences; Circum-Pacific Council; GSA Structural Geology and Tectonics Division
Suzanne Mahlburg Kay, Cornell University, Ithaca, NY; Mark Cloos, University of Texas, Austin, TX
Comparative and specific studies of the Circum-Pacific rim lead to new insights on the relative importance of tectonic factors controlling subduction processes. Interdisciplinary papers that consider broad aspects of all or parts of the rim are encouraged. ORAL and POSTER
Tectonics; Petrology, Igneous; Geophysics/Tectonophysics/Seismology
T145 top The Washington Cascades: An Integrated Perspective on 100 Million Years of Orogenesis, Magmatism, and Surface Processes
GSA Geophysics Division; GSA Structural Geology and Tectonics Division
Peter W. Reiners, Yale University, New Haven, CT; Donna L. Whitney, University of Minnesota, Minneapolis, MN
The Cascades orogen in Washington is a regional tectonic, topographic, and climatic transition zone. The session will examine the structural, petrologic, geophysical, and geomorphic evolution of the Cascades, including relationships between petrologic/tectonic events and surficial processes and mechanisms, timing, and rates of uplift and erosion. ORAL and POSTER
Tectonics; Quaternary Geology/Geomorphology; Petrology, Igneous
T146 top Collisional Tectonics of the Northwest Cordillera: Integration of New Data in Basin Development, Magma Petrogenesis, Geophysics, Structural, and Metamorphic Analysis (Posters)
GSA Structural Geology and Tectonics Division
Ronald B. Cole, Allegheny College, Meadville, PA; Kenneth D. Ridgway, Purdue University, West Lafayette, IN
A forum for new data on terrane accretion processes in southern Alaska and western Canada. Emphasis on structures, basins, and arc systems along terrane suture zones and across terrane assemblages and on plate kinematics related to terrane collision. POSTER
Tectonics; Stratigraphy; Petrology, Igneous
T147 top Crustal Character of the Northwestern Cordilleran Continental Margin
GSA Geophysics Division; GSA Structural Geology and Tectonics Division
R.W. Saltus, U.S. Geological Survey, Denver, CO; T.L. Hudson, Applied Geology, Sequim, WA; D.B. Snyder, Geological Survey of Canada, Ottawa, ON
Presentation of seismic, gravity, and magnetic interpretations (particularly multidisciplinary transects), as well as complimentary studies, that elucidate the full crustal character along the complex continental margin of the northwestern Cordillera. ORAL and POSTER
Geophysics/Tectonophysics/Seismology; Tectonics
T148 top The Cascade Volcanic Arc System
Patrick Muffler, U.S. Geological Survey, Menlo Park, CA; Richard J. Blakely, U.S. Geological Survey, Menlo Park, CA
This session seeks to integrate geological, geochemical, geophysical, and tectonic studies of the Cascade Range into a better understanding of what constitutes the Cascade volcanic arc as a system. Our theme is "connectivity." Speakers are encouraged to look beyond their pieces of real estate and truly integrate beyond their specialties. ORAL and POSTER
Volcanology; Geophysics/Tectonophysics/Seismology; Tectonics
T149 top Seismic Hazards and Neotectonics in Southern Nevada (Posters)
GSA Geophysics Division
Catherine M. Snelson, University of Nevada, Las Vegas, NV; Wanda J. Taylor, University of Nevada, Las Vegas, NV
Recent studies have provided new insights into the neotectonics in southern Nevada. As a result, interest has increased in the seismic hazard assessment, which is particularly important in light of the population growth in Southern Nevada. This session will bring together new and existing studies to address the seismic hazard issues that face the region. POSTER
Tectonics; Geophysics/Tectonophysics/Seismology; Neotectonics/Paleoseismology
T150 top New Views of Seismic Hazard in Cascadia I: Seismology and Seismotectonics
GSA Geophysics Division
Thomas M. Brocher, U.S. Geological Survey, Menlo Park, CA; Kate C. Miller, University of Texas, El Paso, TX; Thomas L. Pratt, U.S. Geological Survey, Seattle, WA
This session showcases latest advances in our understanding of the structural framework, seismotectonics, and site response in Cascadia. Papers will include new results from site response studies in the Seattle basin, crustal imaging of the forearc, monitoring silent-slip events along the megathrust, and studies of the 2001 Nisqually earthquake. ORAL and POSTER
Geophysics/Tectonophysics/Seismology; Neotectonics/Paleoseismology; Structural Geology
T151 top New Views of Seismic Hazard in Cascadia II: Neotectonics of the Cascadia Forearc
GSA Structural Geology and Tectonics Division
Samuel Y. Johnson, U.S. Geological Survey, Lakewood, CO; Ray E. Wells, U.S. Geological Survey, Menlo Park, CA
Multidisciplinary studies of convergent margin deformation and its relation to contemporary strain in the Cascadia forearc, northern California to southern British Columbia. ORAL
Neotectonics/Paleoseismology; Tectonics; Quaternary Geology/Geomorphology
T152 top Global Climate Changes: Abrupt Late Pleistocene Climatic Reversals and Modern Global Warming
Don J. Easterbrook, Western Washington University, Bellingham, WA; Edward B. Evenson, Lehigh University, Bethlehem, PA; John Gosse, Dalhousie University, Halifax, NS
This session will explore global, Late Pleistocene, rapid climatic changes, focusing on the Younger Dryas and Intra-Allerod Cold Period and aspects of global warming during the past century and earlier natural climatic changes. ORAL
GSA Quaternary Geology and Geomorphology Division

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