A CROSS SECTION FROM THE FALL LINE IN EDGEFIELD COUNTY, SOUTH CAROLINA, TO THE ATLANTIC OCEAN IN BEAUFORT COUNTY, SOUTH CAROLINA, ILLUSTRATING COASTAL PLAIN DEPOSITIONAL REALTIONSHIPS

A cross section has been constructed from the Fall Line in Edgefield County, SC, through the Coastal Plain to the Atlantic Ocean in Beaufort County, SC, approximately parallel to the Savannah River. Geologic information was collected from power-auger drilling and outcrop exposures in 25 7.5-minute quadrangles during STATEMAP projects. A compilation cross section was constructed and is here presented. Results include: the identification of Eocene through Pleistocene Coastal Plain surface deposits; recognition of the underlying stratigraphy; and the identification of lateral changes in the underlying Cretaceous to Miocene units. Deposition of younger units has removed older sediments, or in some cases the younger units consist of reworked older deposits. The spatial distribution of preserved Cretaceous to Miocene depositional systems varies from west to east and is controlled by changes in the course of the Savannah River, erosional processes, or fault displacement. Ongoing work is refining the understanding of fault controls on the stratigraphy and the history of the Savannah River basin.