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2004 Denver Annual Meeting (November 7–10, 2004)

Session No. 133
Tuesday, 9 November 2004: 8:00 AM-12:00 PM

P6. Pre-Mesozoic Impacts: Their Effect on Ocean Geochemistry, Magnetic Polarity, Climate Change, and Organic Evolution

GSA Planetary Geology Division; Paleontological Society; GSA Geobiology and Geomicrobiology Division

 

Charles A. Sandberg, Jared R. Morrow and Christian Koeberl, Conveners
Paper #
Start Time
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, 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, jared.morrow@unco.edu, jared.morrow@unco.edu
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, bruce.simonson@oberlin.edu
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, kath.grey@doir.wa.gov.au
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, njb1005@esc.cam.ac.uk
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 and LINDSTRÖM, Maurits, Dept. of Geology and Geochemistry, Stockholm Univ, Stockholm, 10691, Sweden, ormo@inta.es, ormo@inta.es
6
9:40 AM
DID A GAMMA-RAY BURST INITIATE THE LATE ORDOVICIAN MASS EXTINCTION?
LIEBERMAN, Bruce S., Department of Geology, University of Kansas, Lindley Hall, 1475 Jayhawk Blvd., Room 120, Lawrence, KS 66045, blieber@ku.edu, blieber@ku.edu
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, sheehan@uwm.edu
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, joachimski@geol.uni-erlangen.de
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, eberhard.schindler@senckenberg.de
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, gregr@darkwing.uoregon.edu
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, erwin.doug@nmnh.si.edu
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, argo@u.washington.edu
See more of: PARDEE KEYNOTE SYMPOSIA
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