is a beach formed by erosion or deposition
A beach is a landform along the coast of an ocean or sea, or the edge of a lake or river. It usually consists of loose particles, which are often composed of rock, such as sand, gravel, shingle, pebbles, or cobblestones.The particles comprising a beach are occasionally biological in origin, such as mollusc shells or coralline algae.t usually consists of loose particles, which are often composed of rock, such as sand, gravel, shingle, pebbles, or cobblestones. The particles comprising a beach are occasionally biological in origin, such as mollusc shells or coralline algae.