Inlets and lagoonal areas may become isolated from the open water as the wave action and the currents deposit sediment. If a large supply of sediment enters these isolated areas, filling can occur very rapidly resulting in flat swampy and marshy terrain.
Images
barrier beach Burchfield, B. Clark; Foster, Robert; Keller, Edward; Melhorn, Wilton; Brookins, Douglas; Mintz, Leigh; Thurman, Harold.
Physical Geology.
Charles E. Merrill Publishing Co., 1982.
