Sidescan-Sonar Imagery of the Shoreface and Inner Continental Shelf, Wrightsville Beach, North Carolina


Figure 11. Interpretation of cores penetrating the inner shelf dune above. The contact between modern and ancient sediments is distinguished primarily by sediment composition: the modern dunes consist of reworked, residual sediment (bio- and litho-clastic debris) derived from nearby hardgrounds, while the ancient relict) sediments are comprised of in-place, laminated sands and muds indicative of a backbarrier lagoon environment.
Fig. 11, Cross-section (A-A') of an inner shelf crescentic dune, with accompanying sidescan sonar imagery and interpretation of cores penetrating the inner shelf dune above