2004 Denver Annual Meeting (November 7–10, 2004)
Session No. 110 Monday, 8 November 2004
1:30 PM-5:30 PM, Colorado Convention Center: 111/113

T72. Impact Geology II (GSA Planetary Geology Division; GSA Sedimentary Geology Division)

David King and Jared Morrow, Presiding
 Paper #Start Time
 1:30 PM Overview of Session
110-11:35 PM EFFECT OF PLANETARY IMPACT ON MICROBIAL LIFE: AHRENS, Thomas J. and WILLIS, Michael J., Lindhurst Laboratory of Experimental Geophysics, California Institute of Technology, Mail Code 252-21, 1200 E. California Blvd, Pasadena, CA 91125, tja@caltech.edu
110-21:50 PM EVIDENCE FOR O2-POOR ARCHEAN ATMOSPHERE FROM IMPACT SPINELS IN THE BARBERTON GREENSTONE BELT, SOUTH AFRICA: KRULL-DAVATZES, Alexandra1, BYERLY, Gary2, and LOWE, Donald1, (1) Dept. of Geological and Environmental Science, Stanford Univ, Stanford, CA 94305-2115, akrull@pangea.stanford.edu, (2) Dept. of Geology and Geophysics, Louisiana State Univ, Baton Rouge, LA 70803
110-32:05 PM THE INSCRUTABLE EJECTA FROM OCEANIC IMPACTS: ABBOTT, Dallas H., Lamont Doherty Earth Observatory of Columbia Univ, Oceanography Building, Rm 103A, 1000 Route 9W, Palisades, NY 10964, dallas@ldeo.columbia.edu
110-42:20 PM SEARCHING FOR IMPACT FRAGMENTS ACROSS THE EIFELIAN-GIVETIAN BOUNDARY: CLAEYS, Philippe, Department of Geology, Vrije Universiteit Brussel, Pleinlaan 2, Brussel B-1050 Belgium, phclaeys@vub.ac.be
110-52:35 PM CRATER STRATIGRAPHY AND CARBONATE IMPACT SIGNATURES, LATE DEVONIAN ALAMO EVENT, NEVADA: PINTO, Jesús A. and WARME, John E., Geology and Geological Engineering, Colorado School of Mines, Golden, CO 80401, rpinto@mines.edu
110-62:50 PM NEW EVIDENCE ON SIZE AND MARINE SITE OF LATE DEVONIAN ALAMO IMPACT, SOUTHERN NEVADA: 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 HARRIS, Anita G., 1523 East Hillsboro Blvd #1023, Deerfield Beach, FL 33441
 3:05 PM Break
110-73:20 PM WHERE DID THE LATE EOCENE IMPACTORS COME FROM ? THE ASTEROID BELT OR THE OORT CLOUD ?: TAGLE, Roald, Institute of Mineralogy, Humboldt-Univ Berlin, Invalidenstrasse 43, Berlin, 10115, Germany, roald.tagle@rz.hu-berlin.de and CLAEYS, Philippe, Department of Geology, Vrije Universiteit Brussel, Pleinlaan 2, Brussel, B-1050, Belgium
110-83:35 PM NEW GEOPHYSICAL AND BOREHOLE DATA INDICATE THAT THE CHESAPEAKE BAY IMPACT CRATER IS A DEEP, COMPLEX MULTI-RING STRUCTURE: POWARS, David S.1, PIERCE, Herbert A.2, DANIELS, David L.2, GOHN, Gregory S.1, CATCHINGS, Rufus D.3, HORTON, J. Wright Jr1, and EDWARDS, Lucy E.1, (1) U.S. Geol Survey, 926A National Center, Reston, VA 20192, dpowars@visuallink.com, (2) U.S. Geol Survey, 954 National Center, Reston, VA 20192, (3) U.S. Geol Survey, 345 Middlefield Rd, MS-977, Menlo Park, CA 94025
110-93:50 PM IMPACT BRECCIAS OF THE CENTRAL UPLIFT, CHESAPEAKE BAY IMPACT STRUCTURE: INITIAL RESULTS OF A TEST HOLE AT CAPE CHARLES, VIRGINIA: HORTON, J. Wright Jr1, GOHN, Gregory S.1, POWARS, David S.1, JACKSON, John C.2, SELF-TRAIL, Jean M.1, EDWARDS, Lucy E.1, and SANFORD, Ward E.3, (1) U.S. Geol Survey, 926A National Center, Reston, VA 20192, whorton@usgs.gov, (2) U.S. Geol Survey, 954 National Center, Reston, VA 20192, (3) U.S. Geol Survey, 431 National Center, Reston, VA 20192
110-104:05 PM INSIDE THE CRATER, OUTSIDE THE CRATER: COMPARISON OF TWO CORES FROM THE CHESAPEAKE BAY IMPACT STRUCTURE: EDWARDS, Lucy E., POWARS, David S., GOHN, Gregory S., HORTON, J. Wright Jr, LITWIN, Ronald J., and SELF-TRAIL, Jean M., U.S. Geol Survey, 926A National Center, Reston, VA 20192, leedward@usgs.gov
 4:20 PM Break
110-114:35 PM ANATOMY OF A CENTRAL UPLIFT OF A COMPLEX IMPACT CRATER: THE UPHEAVAL DOME STRUCTURE, UTAH: KENKMANN, Thomas1, SCHERLER, Dirk1, JAHN, Andreas1, and IVANOV, Boris A.2, (1) Institute of Mineralogy, Humboldt-Univ Berlin, Invalidenstrasse 43, Berlin, 10115, Germany, thomas.kenkmann@rz.hu-berlin.de, (2) Institute for Geodynamics and Geospheres, Russian Academy of Sci, Moskow, 117939
110-124:50 PM OBLIQUE IMPACT AT WEAUBLEAU-OSCEOLA STRUCTURE, MISSOURI: EVANS, Kevin R.1, ROVEY, Charles W. II1, DAVIS, George H.2, MANTEI, Erwin J.1, MICKUS, Kevin L.1, MILLER, James F.1, MOEGLIN, Thomas D.1, and PLYMATE, Thomas G.1, (1) Department of Geography, Geology, and Planning, Southwest Missouri State Univ, Springfield, MO 65804-0089, kre787f@smsu.edu, (2) Missouri Department of Transportation, Jefferson City, MO 65102
110-135:05 PM THE HORSESHOE-SHAPED RIM OF WETUMPKA MARINE IMPACT CRATER -- FROM OBLIQUE IMPACT OR HETEROGENEITY IN THE RIM?: KING, David T. Jr, Dept. Geology, Auburn Univ, Auburn, AL 36849, kingdat@auburn.edu, PETRUNY, Lucille W., Astra-Terra Rsch, Auburn, AL 36831-3323, and NEATHERY, Thornton L., 1212-H Veterans Memorial Parkway, Tuscaloosa, AL 35404

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