Session No. 204 Wednesday, October 30, 2002

8:00 AM-12:00 PM, Colorado Convention Center: Ballroom 4
T86. Chesapeake Bay Impact Structure: Geology, Geophysics, and Geohydrology of America's Largest Crater
C. Wylie Poag and Gregory S. Gohn, Presiding
 Paper #Start Time
204-18:00 AM STRUCTURE AND MORPHOLOGY OF THE CHESAPEAKE BAY SUBMARINE IMPACT CRATER: POAG, C. Wylie, US Geol Survey, 384 Woods Hole Rd, Woods Hole, MA 02543-1598, wpoag@usgs.gov.
204-28:20 AM A COMPUTATIONAL MODEL OF THE CHESAPEAKE BAY IMPACT: CRAWFORD, David A., Reactive and Thermal Processes Dept. 9116, Sandia National Laboratories, P. O. Box 5800, MS 0836, Albuquerque, NM 87185, dacrawf@sandia.gov.
204-38:40 AM LITHOSTRATIGRAPHIC FRAMEWORK OF THE CRATER-FILL DEPOSITS: WESTERN ANNULAR TROUGH, CHESAPEAKE BAY IMPACT CRATER: POWARS, David S.1, GOHN, Gregory S.1, EDWARDS, Lucy E.1, CATCHINGS, Rufus D.2, BRUCE, T. Scott3, JOHNSON, Gerald H.4, and POAG, C. Wylie5, (1) U.S. Geol Survey, 926A National Center, Reston, VA 20192, dspowars@usgs.gov, (2) US Geol Survey, 345 Middlefield Rd, MS-977, Menlo Park, CA 94025-3591, (3) Virginia Dept. of Environmental Quality, Richmond, VA 23240, (4) Geology Department, College of William and Mary, Williamsburg, VA 23187, (5) US Geol Survey, 384 Woods Hole Rd, Woods Hole, MA 02543-1598
204-49:00 AM VARIATION OF IMPACT RESPONSE WITH DEPTH AND LITHOLOGY, OUTER ANNULAR TROUGH OF THE CHESAPEAKE BAY IMPACT STRUCTURE, VIRGINIA COASTAL PLAIN: GOHN, Gregory S.1, POWARS, David S.1, QUICK, James E.1, HORTON, J. Wright Jr1, and CATCHINGS, Rufus D.2, (1) U.S. Geol Survey, 926A National Center, Reston, VA 20192, ggohn@usgs.gov, (2) U.S. Geol Survey, 345 Middlefield Road, Menlo Park, CA 94025
204-59:20 AM PALEONTOLOGY OF CRATER-FILL DEPOSITS, CHESAPEAKE BAY IMPACT STRUCTURE, VIRGINIA: EDWARDS, Lucy E., U.S. Geol Survey, National Center MS 926A, Reston, VA 20192, leedward@usgs.gov, FREDERIKSEN, Norman O., US Geol Survey, 926-A National Ctr, Reston, VA 20192-0001, SELF-TRAIL, Jean M., U.S. Geol Survey, 926A National Center, Reston, VA 20192, and POAG, C. Wylie, US Geol Survey, 384 Woods Hole Rd, Woods Hole, MA 02543-1598
204-69:40 AM CHESAPEAKE BAY IMPACT CRATER: PETROGRAPHIC AND GEOCHEMICAL INVESTIGATIONS OF THE IMPACT BRECCIA FILL: REIMOLD, Wolf Uwe, School of Geosciences, Univ of the Witwatersrand, Private Bag 3, PO Wits, Johannesburg, 2050, South Africa, 065wur@cosmos.wits.ac.za, KOEBERL, Christian, Institute of Geochemistry, Univ of Vienna, Althanstrasse 14, Vienna, A-1090, Austria, and POAG, C. Wylie, US Geol Survey, 384 Woods Hole Rd, Woods Hole, MA 02543-1598
204-710:00 AM PETROGRAPHY, GEOCHRONOLOGY, AND SIGNIFICANCE OF CRYSTALLINE BASEMENT ROCKS AND IMPACT-DERIVED CLASTS IN THE CHESAPEAKE BAY IMPACT STRUCTURE, SOUTHEASTERN VIRGINIA: HORTON, J. Wright Jr1, KUNK, Michael J.2, NAESER, Charles W.1, NAESER, Nancy D.1, ALEINIKOFF, John N.2, and IZETT, Glen A.3, (1) U.S. Geol Survey, 926A National Center, Reston, VA 20192, whorton@usgs.gov, (2) U.S. Geol Survey, MS 963, Denver Federal Center, Denver, CO 80225, (3) Dept. of Geology, College of William and Mary and Emeritus USGS, 3012 East Whittaker Close, Williamsburg, VA 23285
204-810:20 AM DISTAL IMPACT EJECTA FROM THE CHESAPEAKE BAY IMPACT STRUCTURE: GLASS, B.P., Geology Dept, Univ. of Delaware, Newark, DE 19716, bglass@udel.edu.
204-910:40 AM HYDROCHEMICAL EVIDENCE FOR THE ORIGIN OF ELEVATED GROUND-WATER SALINITY IN THE CHESAPEAKE BAY IMPACT STRUCTURE, SOUTHEASTERN VIRGINIA: MCFARLAND, E. Randolph, Water Resources Division, U.S. Geol Survey, 1730 East Parham Road, Richmond, VA 23228, ermcfarl@usgs.gov.
204-1011:00 AM POSSIBLE HYDROTHERMAL ACTIVITY FOLLOWING THE CHESAPEAKE BAY BOLIDE IMPACT: SANFORD, Ward E., U. S. Geol Survey, Mail Stop 431, Reston, VA 20192, wsanford@usgs.gov.
204-1111:15 AM SPATIAL AND TEMPORAL RELATIONSHIPS BETWEEN DIKES, THERMAL SPRINGS, AND DRAINAGE DIVIDES IN THE APPALACHIAN VALLEY & RIDGE AND THE CHESAPEAKE BAY IMPACT STRUCTURE: DIECCHIO, Richard J., Environmental Science & Policy, George Mason Univ, Fairfax, VA 22030-4444, rdiecchi@gmu.edu.
204-1211:30 AM BIOSPHERIC CONSEQUENCES OF THE CHESAPEAKE BAY BOLIDE IMPACT: POAG, C. Wylie, US Geol Survey, 384 Woods Hole Rd, Woods Hole, MA 02543-1598, wpoag@usgs.gov.

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