The plain composed of horizontal or gently sloping strata of clastic material fronting the coast and generally representing a strip of recently emerged sea bottom that has emerged from the sea in recent geologic times Also formed by aggradation
Any plain (or plains) of unconsolidated fluvial or marine sediment that had its margin on the shore of a large body of water, particularly the sea (For example, the Atlantic Coastal Plain of the Southeastern United States, which extends for 3,000 miles from New Jersey to Texas)
Any plain of unconsolidated fluvial or marine sediment which had its margin on the shore of a large body of water, particularly the sea, e g , the coastal plain of the Southeastern USA, extending for 5000 km from New Jersey to Texas