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| 133-1 | 8:00 AM | LATE DEVONIAN IMPACTS, EVENTS, AND EXTINCTIONS — A PARADIGM FOR PRE-MESOZOIC EARTH HISTORY: MORROW, Jared R., Department of Earth Sciences, Univ of Northern Colorado, Campus Box 100, Greeley, CO 80639, jared.morrow@unco.edu, SANDBERG, Charles A., Geologist Emeritus, U.S. Geol Survey, Box 25046, MS 939, Federal Center, Denver, CO 80225, and KOEBERL, Christian, Department of Geological Sciences, Univ of Vienna, Althanstrasse 14, A-1090, Vienna, Austria |
| 133-2 | 8:20 AM | THE INFLUENCE OF IMPACTS ON THE FIRST 87% OF EARTH HISTORY: SIMONSON, Bruce M., Geology Department, Oberlin College, Oberlin, OH 44074-1052, bruce.simonson@oberlin.edu. |
| 133-3 | 8:40 AM | THE ACRAMAN IMPACT AND ITS RELATION TO THE SNOWBALL EARTH AND BIOTIC DIVERSIFICATION: GREY, Kathleen, Geological Survey of Western Australia, Dept. of Industry and Resources, Mineral House, 100 Plain Street, East Perth 6004, kath.grey@doir.wa.gov.au. |
| 133-4 | 9:00 AM | TEMPORAL DISCONTINUITY IN THE IMPACT OF IMPACTS: THE PRE-PHANEROZOIC FOLLOWS DIFFERENT RULES: BUTTERFIELD, Nicholas J., Department of Earth Sciences, Univ of Cambridge, Downing Street, Cambridge CB2 3EQ United Kingdom, njb1005@esc.cam.ac.uk. |
| 133-5 | 9:20 AM | DOES THE MARINE-TARGET CRATER RECORD REFLECT AN INCREASED COSMIC BOMBARDMENT DURING THE MIDDLE ORDOVICIAN?: ORMÖ, Jens, Centro de Astrobiología (INTA/CSIC), Instituto Nacional de Técnica Aeroespacial, Ctra de Torrejón a Ajalvir, km 4, Torrejón de Ardoz, Madrid, 28850, Spain, ormo@inta.es and LINDSTRÖM, Maurits, Dept. of Geology and Geochemistry, Stockholm Univ, Stockholm, 10691, Sweden |
| 133-6 | 9:40 AM | DID A GAMMA-RAY BURST INITIATE THE LATE ORDOVICIAN MASS EXTINCTION?: LIEBERMAN, Bruce S., Geology, Univ Kansas, 120 Lindley Hall, 1475 Jayhawk Blvd, Lawrence, KS 66045-7613, blieber@ku.edu. |
| 133-7 | 10:00 AM | THE LATE ORDOVICIAN EXTINCTION: ECOLOGICAL SIGNATURE OF A NON-IMPACT EVENT: SHEEHAN, Peter M., Geology, Milwaukee Public Museum, 800 W. Wells St, Milwaukee, WI 53233, sheehan@uwm.edu. |
| 133-8 | 10:20 AM | GEOCHEMISTRY OF LATE DEVONIAN OCEANS: JOACHIMSKI, Michael M. and BUGGISCH, Werner, Institute of Geology and Mineralogy, Univ of Erlangen-Nürnberg, Schlossgarten 5, Erlangen, 91054, joachimski@geol.uni-erlangen.de |
| 133-9 | 10:40 AM | LATE DEVONIAN BIOEVENTS: WHAT MUST BE CONSIDERED?: SCHINDLER, Eberhard, Forschungsinstitut Senckenberg, Senckenberganlage 25, Frankfurt am Main D-60325 Germany, eberhard.schindler@senckenberg.de. |
| 133-10 | 11:00 AM | ANOTHER LOOK AT IMPACT, METHANE OUTBURSTS AND EXTINCTION MECHANISMS AT THE PERMIAN-TRIASSIC BOUNDARY: RETALLACK, Gregory J., Department of Geological Sciences, Univ of Oregon, Eugene, OR 97403, gregr@darkwing.uoregon.edu. |
| 133-11 | 11:20 AM | OVERVIEW OF END-PERMIAN EVENTS: IMPACTS AND MASS EXTINCTION: ERWIN, Douglas H., Department of Paleobiology, MRC-121, Smithsonian Institution, Washington, DC 20560, erwin.doug@nmnh.si.edu. |
| 133-12 | 11:40 AM | THE PERMIAN EXTINCTION- JUST HOW CATASTROPHIC WAS IT?: WARD, Peter D., Biology, Univ of Washington, Kincaid Hall, University of Washington, Seattle, WA 98195, argo@u.washington.edu. |
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