+A **coastal plain** is a flat, low-lying geographic region adjacent to a [Coast](/wiki/Coast). These expanses are typically formed by the deposition of [Sediment](/wiki/Sediment) from rivers or by changes in sea level, gently sloping upward from the ocean toward higher inland terrain.
+## See also
+- [Plain](/wiki/Plain)
+- [Delta](/wiki/Delta)
+- [Geology](/wiki/Geology)
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