The type of depositional feature along a shoreline is a mound of sand that links a small offshore island to the mainland, which is basically a Tombolo.
Depositional coastlines are described by the infusion of sediment from cliffs, beaches, and river estuaries of sea-bed caches. Material is redistributed by waves, tides, and currents in low-energy states and is deposited along the coast or just off-shore to design unique characteristics.
Tombolo is one or more shallows or slavers that link an island to the mainland. A single tombolo may join a tied island to the mainland, as at Marblehead, Mass. A double tombolo retains a lagoon that ultimately suffices with sediment.
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