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Detailed Reference Information |
Talwani, P., Wildermuth, E. and Parkinson, C.D. (2003). An impact crater in northeast South Carolina inferred from potential field data. Geophysical Research Letters 30: doi: 10.1029/2003GL017051. issn: 0094-8276. |
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A comparison of recently acquired gravity data with aeromagnetic data for northeastern South Carolina revealed the presence of coincident circular anomalies near Johnsonville. These ~11 km diameter circular lows meet the geophysical criteria for those associated with buried complex impact craters. Within the magnetic low is a northwest-southeast structure enclosed by two concentric moat-like lows to its northeast and southwest. The pattern of surface streams passing above the structure is also consistent with the interpretation of a buried impact crater. Fortuitously, a drill core was available from a borehole drilled within these lows. The core includes ~10 m of Paleozoic crystalline Piedmont basement. Petrographic analysis of basement samples from the core revealed indications of shock metamorphic texture. |
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Abstract |
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Keywords
Exploration Geophysics, Gravity methods, Geomagnetism and Paleomagnetism, Magnetic anomaly modeling, Global Change, Impact phenomena |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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