2011 GSA Annual Meeting in Minneapolis (912 October 2011)
Session No. 117 Monday, 10 October 2011
9:00 AM-6:00 PM, Minneapolis Convention Center: Hall C

T212. Impact Cratering on the Earth, Moon, and Planets: Remote, Field, and Lab Studies (Posters) (GSA Planetary Geology Division; GSA Sedimentary Geology Division; GSA Geophysics Division; GSA Structural Geology and Tectonics Division; GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division; International Continental Drilling Program)

Authors will be present from 2 to 4 PM, and 4:30 to 6 PM
 Paper #Booth #
117-1331SETTING AND SIGNIFICANCE OF ZIRCON/BADDELEYITE IN BASAL UNIT OF ROOIBERG GROUP, STAVOREN INLIER, 2.06 GA BUSHVELD COMPLEX, SOUTH AFRICA: ELSTON, Wolfgang E., Earth and Planetary Sciences, University of New Mexico, Northrop Hall, MS03-2040, 1 University of New Mexico, Albuquerque, NM 87131, welston@unm.edu and TEGTMEIER, Eric L., Earth and Planetary Sciences, University of New Mexico, MS03 2040, Albuquerque, NM 87131
117-2332PRELIMINARY STUDIES OF COEXISTING MICRON-SCALE ZIRCON AND BADDELEYITE IN SILICEOUS ROCKS FROM THE BASAL ROOIBERG GROUP, BUSHVELD COMPLEX, SOUTH AFRICA: TEGTMEIER, Eric L.1, BREARLEY, Adrian2, ELSTON, Wolfgang E.1, and SPILDE, Michael N.3, (1) Department of Earth and Planetary Sciences, University of New Mexico, Northrop Hall, MSC03 2040, 1 University of New Mexico, Albuquerque, NM 87131, teggy@unm.edu, (2) Earth and Planetary Sciences, University of New Mexico, MSC03 2040, Albuquerque, NM 87131, (3) Institute of Meteoritics, University of New Mexico, MSC03-2050, Albuquerque, NM 87131
117-3333THE SUDBURY IMPACT LAYER AT GUNFLINT LAKE, MINNESOTA: INFERENCES FROM GEOCHEMISTRY ABOUT EJECTA SOURCES AND DELIVERY MECHANISMS: JIRSA, Mark A., Minnesota Geological Survey, Univ of Minnesota, 2642 University Ave, St. Paul, MN 55114, jirsa001@umn.edu and WEIBLEN, Paul W., Minnesota Geological Survey, University of Minnesota, 2642 University Ave. W, Saint Paul, MN 55114, Minneapolis, MN 55114
117-4334VARIATION OF FALLOUT EJECTA WITH DISTANCE FROM THE SUDBURY CRATER: HUBER, Matthew S., Department of Lithospheric Research, University of Vienna, Althanstrasse 14, Vienna, 1090, Austria, matthew.huber@univie.ac.at and KOEBERL, Christian, Department of Lithospheric Research, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria, also of the Natural History Museum, Burgring 7, A-1010 Vienna, Austria
117-5335TYCHO SECONDARY CRATERS IDENTIFIED VIA EJECTED BOULDERS: BART, Gwendolyn D., NICKERSON, Ryan, and JOHNSON, Andrew, Dept. of Physics, Univ. of Idaho, Campus Box 440903, Moscow, ID 83844-0903, gbarnes@uidaho.edu
117-6336THE MORPHOLOGY OF MARTIAN IMPACT CRATERS IN 'SOFT' VS. 'HARD' TERRAIN: NOLAN, Patrick R., Geology, Mercyhurst College, 501 East 38th Street, Erie, PA 16546, pnolan76@lakers.mercyhurst.edu and LANG, Nicholas P., Department of Geology, Mercyhurst University, 501 E. 38th Street, Erie, PA 16546
117-7337THERMOPHYSICAL PROPERTIES OF MARTIAN LAYERED CRATER EJECTA: RELATIONSHIP TO EMPLACEMENT PROCESSES: PIATEK, Jennifer L., Dept. of Physics and Earth Sciences, Central Connecticut State University, 506 Copernicus Hall, 1615 Stanley St, New Britain, CT 06050, piatekjel@ccsu.edu and TORNABENE, Livio, Centre for Planetary Science & Exploration, University of Western Ontario, Department of Earth Sciences, 1151 Richmond Street, London, ON ON N6A 5B7, Canada
117-8338THE ALTERATION OF IMPACT MELT - A FIRST STEP: DYPVIK, Henning1, HELLEVANG, Helge2, and KALLESON, Elin2, (1) Department of Geosciences, University of Oslo, Oslo, NO-0316, Norway, henning.dypvik@geo.uio.no, (2) Department of Geosciences, University of Oslo, Pb. 1047, Blindern, Oslo, 0316, Norway
117-9339EJECTA STRATA OF RECENT ORIGIN HAVE BEEN IDENTIFIED IN CENTRAL WISCONSIN AT GLOVER BLUFF IMPACT SITE: RENARD, Gene M., Wiscah Geologic, LLC, 3224 Memorial Drive, Two Rivers, WI 54241, gene.renard@wiscah.com
117-10340SHALLOW STRATIGRAPHIC CROSS-SECTION OF WETUMPKA IMPACT STRUCTURE, ALABAMA: KING, David T. Jr1, ORMO, Jens2, PETRUNY, Lucille1, HARRIS, R. Scott3, MARKIN, James K.1, JOHNSON, Reuben C.1, TABARES RODENAS, Pascual1, RODESNEY, Steven N.1, and NEATHERY, Thornton L.4, (1) Geology Office, Auburn University, Auburn, AL 36849, kingdat@auburn.edu, (2) Centro de Astrobiologia, Torrejon de Ardoz, 28850, Spain, (3) Department of Geosciences, Georgia State University, Atlanta, GA 30302, (4) Neathery and Associates, Veteran's Parkway, Tuscaloosa, AL 35404
117-11341XENOCLAST BIOSTRATIGRAPHY: EVIDENCE FOR MID-MISSISSIPPIAN AND LATE ORDOVICIAN IMPACTS AT WEAUBLEAU AND DECATURVILLE STRUCTURES, MISSOURI: EVANS, Kevin1, MILLER, James F.1, and ETHINGTON, Raymond2, (1) Geography, Geology, and Planning Department, Missouri State University, 901 S. National Ave, Springfield, MO 65897, KevinEvans@MissouriState.edu, (2) Geological Sciences Department, University of Missouri, 101 Geological Sciences Bldg, Columbia, MO 65211
117-12342TIMING AND EMPLACEMENT OF INJECTION DIKES AT THE GARDNOS IMPACT STRUCTURE: JARET, Steven, JACOBSEN, S.B., and PETAEV, Michail I., Department of Earth & Planetary Sciences, Harvard University, Cambridge, MA 02138, sjaret@fas.harvard.edu
117-13343SEARCH FOR EXTRATERRESTRIAL SIGNATURES OF A POSSIBLE IMPACT EVENT IN THE DIAMICTITE/CAP CARBONATE TRANSITIONS AFTER SNOWBALL EARTH GLACIATIONS (STURTIAN, MARINOAN), OTAVI GROUP, NW-NAMIBIA: GYOLLAI, Ildiko1, POPP, Friedrich2, MADER, Dieter1, and KOEBERL, Christian3, (1) Department of Lithospheric Research, University of Vienna, Althanstrasse 14, Vienna, A-1090, Austria, gyildi@gmail.com, (2) Department of Geodynamics and Sedimentology, University of Vienna, Althanstrasse 14, Vienna, A-1090, Austria, (3) Department of Lithospheric Research, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria, also of the Natural History Museum, Burgring 7, A-1010 Vienna, Austria
117-14344PETROGRAPHIC AND COMPOSITIONAL CHARACTERIZATION OF METALLIC SPHERULES IN IMPACT MELT AT MONTURAQUI CRATER, CHILE: PEATE, David W.1, UKSTINS PEATE, Ingrid2, LIM, Chungwan2, and KLOBERDANZ, Christine2, (1) Dept. of Earth & Environmental Sciences, University of Iowa, 121 Trowbridge Hall, Iowa City, IA 52242, david-peate@uiowa.edu, (2) Dept. of Geoscience, University of Iowa, 121 Trowbridge Hall, Iowa City, IA 52242
117-15345RAPID SHOCK LEVEL DETERMINATION IN SILICATES USING POWDER X-RAY DIFFRACTION: RODESNEY, Steven N., Department of Geology and Geography, Auburn University, Auburn, AL 36849, rodesney@me.com and HARRIS, R. Scott, Department of Geosciences, Georgia State University, Atlanta, GA 30302

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