coastal deposition

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The laying down of sediment (deposition) in a low-energy environment with constructive waves. Coastal deposition occurs where there is a large supply of material from cliffs, rivers, or beaches, longshore drift, and an irregular coastline. Geographical features include the spit, bar, beach, foreland, and tombolo, such as at Chesil Beach, England.

Most beaches display a number of features of coastal deposition. These include cusps, semi-circular scalloped embankments found in the shingle or shingle/sand junction; ripples formed by wave action or tidal currents; storm beaches, noticeable ridges found at the level of the highest spring tides; and small-scale beach ridges known as berms, which are built up by successive levels of tides or storms.

Modelled on the French tricolour, the vertical stripes represent liberty and revolution. The almost square proportions of the flag are unusual. Effective date: 23 January 1831. >>