MAPPING SURFICIAL SAND SHOALS ON SOUTH CAROLINA’S OUTER CONTINENTAL SHELF: RELATIONSHIPS BETWEEN STRATIGRAPHY, BATHYMETRY, AND SAND DEPOSITION
Shoals with a 5 foot or greater sand thickness were identified in data collected offshore of Hilton Head Island, Cape Romain, Folly Beach, and Kiawah Island, SC. In total, kriging analyses accomplished using Surfer data modeling software show the volume of sand within these shoals to be upwards of an estimated 348 million cubic meters. Mapping efforts are currently underway to consider the role that bathymetry plays in the occurrence and distribution of sand shoals on the seafloor, and comparing those results with analyses of trends in textural data, specifically grain size, of samples collected from vibracores. The spatial distribution and average relief of the sand-shoal data are presented with consideration given to other features identified in the seismic data, such as paleochannels, and placed in the context of the overall paleolandscape of the near OCS offshore of South Carolina.