Coastal Depositional Features

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Coastal Depositional Features

  • Created by constructive waves depositing material (sand, shingle and pebbles) that has been transported from further along the coast.
  • They lie between high and low watermark and are gently sloping, towards the sea.
  • A constantly changing feature, beaches may be built up at certain times of the year, and eroded away at others, depending on the type of waves hitting them at the time. Often this change can be seasonal.

  • A long, narrow ridge of sand attached at one end to the coast.
  • Built up by long shore drift transporting material along the coast.
  • At a bend or break (for an estuary) in the coastline the material being carried is dropped. However it is deposited away from the coastline.
  • As the spit builds out to sea the end is affected more by the wind and by wave currents, causing the end to curve towards the shore, to create a hook end.
  • Material often accumulates in the area of standing water that occurs behind a spit, and this can lead to the formation of salt marshes.
  • Spits can be areas where large sand dunes build up, nearer the back of it.
  • A ridge of sand that blocks off a bay or river mouth. It will create a lagoon behind it is across a non-river bay.
  • A bar of deposited material linking the mainland to an island.

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