washover-fan flat

washover-fan flat:    A gently sloping, fan-like, subaqueous landform created by overwash from storm surges that transports sediment from the seaward side to the landward side of a barrier island (GG). Sediment is carried through temporary overwash channels that cut through the dune complex on the barrier spit (Fisher and Simpson, 1979; Boothroyd et al., 1985; Davis, 1994) and spill out onto the lagoon-side platform where they coalesce to form a broad belt. Also called storm-surge platform flat (Boothroyd et al., 1985) and washover fan apron (GG).

   Compare: washover-fan slope.

   SSS

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washover-fan slope — A subaqueous extension of a washover fan flat that slopes toward deeper water of a lagoon or estuary and away from the washover fan flat. Compare: washover fan flat. SSS … Glossary of landform and geologic terms
washover fan — A fan like deposit of sand washed over a barrier island or spit during a storm and deposited on the landward side. Washover fans can be small to medium sized and completely subaerial, or they can be quite large and include subaqueous margins… … Glossary of landform and geologic terms
washover-fan apron — (not preferred) use washover fan flat … Glossary of landform and geologic terms
back-barrier flat — A subaerial, gently sloping landform on the lagoon side of the barrier beach ridge composed predominantly of sand washed over or through the beach ridge during tidal surges; a portion of a barrier flat. Compare: washover fan flat. SSS … Glossary of landform and geologic terms
coastal landforms — ▪ geology Introduction any of the relief features present along any coast, the result of a combination of processes, sediments, and the geology of the coast itself. The coastal environment of the world is made up of a wide variety of… … Universalium

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