Physics – Geophysics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30g..19t&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 7, pp. 19-1, CiteID 1366, DOI 10.1029/2003GL017051
Physics
Geophysics
Exploration Geophysics: Gravity Methods, Geomagnetism And Paleomagnetism: Magnetic Anomaly Modeling, Global Change: Impact Phenomena
Scientific paper
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.
Parkinson Chris D.
Talwani Pradeep
Wildermuth Eric
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