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

Glossary of landform and geologic terms. 2013.

Look at other dictionaries:

  • 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