Identification of a Northwest Trending Seismogenic Graben near Charleston, South Carolina.

摘要

Shallow stratigraphic drilling and gamma logging in the meizoseismal area of the Charleston, 1886 earthquake were used to map three Tertiary unconformities. Results suggest the presence of a northwest extending graben between Charleston and Kiawah Island, S.C. The 40 km long and 18 km wide graben is bounded on three sides by inferred, mappable faults. The Charleston fault extends northwest from Goose Creek, near Charleston through Woodstock and toward Ridgeville. The Ashley River fault extends northwest from Kiawah Island through Rantowles, S.C. Both faults are projected to land surface using cross-sections of Pleistocene sediments and geodetic data.