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

Session No. 110
Monday, 8 November 2004: 1:30 PM-5:30 PM

T72. Impact Geology II

GSA Planetary Geology Division; GSA Sedimentary Geology Division

 

David King and Jared Morrow, Advocates
Paper #
Start Time
 
1:30 PM
Overview of Session
1
1:35 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, tja@caltech.edu
2
1:50 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, (2)Dept. of Geology and Geophysics, Louisiana State Univ, Baton Rouge, LA 70803, akrull@pangea.stanford.edu, akrull@pangea.stanford.edu
3
2:05 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, dallas@ldeo.columbia.edu
4
2:20 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, phclaeys@vub.ac.be
5
2:35 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, rpinto@mines.edu
6
2:50 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, 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, jared.morrow@unco.edu, jared.morrow@unco.edu
 
3:05 PM
Break
7
3:20 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 and CLAEYS, Philippe, Department of Geology, Vrije Universiteit Brussel, Pleinlaan 2, Brussel, B-1050, Belgium, roald.tagle@rz.hu-berlin.de, roald.tagle@rz.hu-berlin.de
8
3:35 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 Jr, J. Wright1 and EDWARDS, Lucy E.1, (1)U.S. Geol Survey, 926A National Center, Reston, VA 20192, (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, dpowars@visuallink.com, dpowars@visuallink.com
9
3:50 PM
IMPACT BRECCIAS OF THE CENTRAL UPLIFT, CHESAPEAKE BAY IMPACT STRUCTURE: INITIAL RESULTS OF A TEST HOLE AT CAPE CHARLES, VIRGINIA
HORTON Jr, J. Wright1, 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, (2)U.S. Geol Survey, 954 National Center, Reston, VA 20192, (3)U.S. Geol Survey, 431 National Center, Reston, VA 20192, whorton@usgs.gov, whorton@usgs.gov
10
4:05 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 Jr, J. Wright, LITWIN, Ronald J. and SELF-TRAIL, Jean M., U.S. Geol Survey, 926A National Center, Reston, VA 20192, leedward@usgs.gov, leedward@usgs.gov
 
4:20 PM
Break
11
4:35 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, (2)Institute for Geodynamics and Geospheres, Russian Academy of Sci, Moskow, 117939, thomas.kenkmann@rz.hu-berlin.de, thomas.kenkmann@rz.hu-berlin.de
12
4:50 PM
OBLIQUE IMPACT AT WEAUBLEAU-OSCEOLA STRUCTURE, MISSOURI
EVANS, Kevin R.1, ROVEY II, Charles W.1, DAVIS, George H.2, MANTEI, Erwin J.1, MICKUS, Kevin L.3, MILLER, James F.3, MOEGLIN, Thomas D.1 and PLYMATE, Thomas G.3, (1)Department of Geography, Geology, and Planning, Southwest Missouri State Univ, Springfield, MO 65804-0089, (2)Missouri Department of Transportation, Jefferson City, MO 65102, (3)Department of Geography, Geology, and Planning, Southwest Missouri State Univ, Springfield, MO 65804, kre787f@smsu.edu, kre787f@smsu.edu
13
5:05 PM
THE HORSESHOE-SHAPED RIM OF WETUMPKA MARINE IMPACT CRATER -- FROM OBLIQUE IMPACT OR HETEROGENEITY IN THE RIM?
KING Jr, David T., Dept. Geology, Auburn Univ, Auburn, AL 36849, PETRUNY, Lucille W., Astra-Terra Rsch, Auburn, AL 36831-3323 and NEATHERY, Thornton L., 1212-H Veterans Memorial Parkway, Tuscaloosa, AL 35404, kingdat@auburn.edu, kingdat@auburn.edu
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