HR: 0800h
AN: NS31A-03    [Abstracts]
TI: High resolution seismic imaging at the Odessa (TX) meteorite impact site: the ground-impact geohazard and integration with magnetic gradiometry and time-domain electromagnetics
AU: * Soule, D
EM: dax.soule@tamu.edu
AF: Texas A&M University, Dept. of Geology and Geophysics, College Station, TX 77845, United States
AU: Everett, M
EM: everett@geo.tamu.edu
AF: Texas A&M University, Dept. of Geology and Geophysics, College Station, TX 77845, United States
AB: Comet and asteroid bombardment along with impact crater formation has occurred continuously throughout Earth's history. The greatest impact-related geohazard is due to moderate sized impactors which represent the worst-case trade-off between frequency of occurrence, difficulty of mitigation, and severity of environmental destruction. Impacts in this size range pose a significant regional threat to densely populated areas. The primary objective of this research is to evaluate the ground-impact geohazard via high resolution seismic imaging of the remnants of a moderate-sized impact event, namely that associated with the 50 ka Odessa (TX) Group IAB iron meteorite. We provide high-resolution subsurface images of the 150-m diameter crater, the outcropping crater rim, the ejecta blanket, and the surrounding plain. The subsurface images are analyzed in terms of the deformation and thrusting of the underlying Cretaceous limestone and shale strata and the likely environmental effects caused by the impact. The analysis will build upon and extend our previous geophysical investigations based on magnetic gradiometry and time-domain electromagnetic data.
DE: 0935 Seismic methods (3025, 7294)
DE: 5420 Impact phenomena, cratering (6022, 8136)
DE: 8136 Impact phenomena (5420, 6022)
SC: Near-Surface Geophysics [NS]
MN: 2007 Joint Assembly