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GSA2015 ANNUAL MEETING & EXPOSITION
GSA TODAY | MAY 2015 T167. Metamorphic, Metasomatic, and Igneous Processes in the T172. Geology of Dwarf Planets: First Results from NASA’s
Mid- and Deep Continental Crust: Mechanisms and Processes Dawn Mission to Ceres
That Impact Mass Transport and Rheology Disciplines: Planetary Geology; Geomorphology; Stratigraphy
Disciplines: Petrology, Metamorphic; Petrology, Igneous; Advocates: David A. Williams; Debra L. Buczkowski
Structural Geology
Advocates: G. Christopher Koteas; Callum J. Hetherington Dwarf planets are small planetary objects whose geology is
unknown. 2015 marks the first exploration of Ceres by NASA’s
Showcase the integration of field studies, with textural and Dawn mission. This session reports first results on the geology of
compositional analysis, and modeling of processes in continental Ceres, including the role of water in shaping this world.
crust: This session will highlight mechanisms and processes that
produce, transport, and modify the deep continental crust. T173. Impact Cratering on Earth and in the Solar System
Disciplines: Planetary Geology; Geophysics/Geodynamics
T168. Subduction, Fluids, Accessory Minerals, and Trace Advocates: Christian Koeberl; Jeffrey Plescia
Elements: A Celebration of Sorena Sorensen’s Career
Disciplines: Petrology, Metamorphic; Geochemistry; Data from terrestrial fieldwork, advances in modeling and
Mineralogy/Crystallography experimentation, and spacecraft data have provided significant
Advocates: Barbara L. Dutrow; Sarah Penniston-Dorland; new insight into the characteristics of the impact cratering
Virginia Sisson processes. This session will provide an opportunity to share infor-
mation and insight.
This session will focus on metamorphosed subduction-related
rocks including metamorphosed rocks of the subduction channel T174. Microscopic Impact Records
as well as arc crust, associated fluids, and minerals, cathodolumi- Disciplines: Planetary Geology; Mineralogy/Crystallography;
nescence, and trace elements that provide information about their Geochemistry
petrogenesis. Advocate: Aaron J. Cavosie
T169. The Extremes of Metamorphism Advances in instrumentation allow microstructural and
Disciplines: Petrology, Metamorphic; Tectonics/Tectonophysics; geochemical investigations of impact records at microscopic and
Structural Geology smaller scales, providing new insights on impact histories. This
Advocates: Victor Guevara; Chris Yakymchuk; Besim Dragovic; session welcomes contributions describing approaches to unrav-
Omar Bartoli eling small-scale records of impact processes.
Extreme crustal metamorphism (UHT, UHP) informs us about T175. Oceans, Fire, and Ice of the Outer Solar System
fundamental Earth processes, but difficulties in quantifying such Discipline: Planetary Geology
metamorphism remain. We encourage innovative approaches to Advocate: D. Alex Patthoff
understanding the hottest, deepest, shortest, longest, oldest, and
youngest metamorphism on Earth. We encourage abstracts relating to surface, structural, and
tectonic processes; interior, and thermal evolution of solid bodies
Planetary Geology of the outer solar system; and planetary analogs. This includes
experimental, observational, and theoretical approaches.
T170. Experimental Investigations of Planetary Geologic
Processes (Posters) T176. Past and Present Biosignature Recognition on Earth
Disciplines: Planetary Geology; Geochemistry; Geophysics/ and Mars
Geodynamics Disciplines: Planetary Geology; Sediments, Clastic; Sediments,
Advocates: Danielle Y. Wyrick; Paul K. Byrne Carbonates
Advocates: Sally L. Potter-McIntyre; Charity Phillips-Lander
This session solicits abstracts regarding experimental and labo-
ratory analyses of geologic processes and materials under the Diagnostic biosignatures can be from extant life (e.g., spectral
range of dynamic, kinematic, temperature, pressure, and chemical atmospheric signatures) or preserved in the rock record (e.g., stro-
parameters found throughout the Solar System. matolites). This forum will discuss advances in the search for life,
focusing specifically on Earth and Mars.
T171. Exploring the Sedimentary Rock Record of Mars
Disciplines: Planetary Geology; Sediments, Clastic; Stratigraphy T177. When Water Meets Rock: Aqueous Alteration in the
Advocates: Kathryn M. Stack; Kenneth Edgett; Kevin Lewis Solar System
Disciplines: Planetary Geology; Geochemistry; Mineralogy/
This session will include a synthesis of sedimentary rocks on Crystallography
Mars and implications for surface processes, depositional settings, Advocates: Rebecca N. Greenberger; John F. Mustard
and environments of early Mars.
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