Grain-size and composition data for bottom grab samples are presented on the surface sediments panel. Samples consist principally of quartz-rich sand and carbonate sand and gravel. Carbonate sand and gravel dominate offshore and immediately adjacent to the barrier island. Quartz sand dominates on the inner shelf. The coarse-grained facies is thin and typically exhibits ripple crests that trend N-S with a 40- to 70-cm spacing.
