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Depositional Landforms (Offshore Bars (What is it? (Offshore bars, also…
Depositional Landforms
Offshore Bars
What is it?
Offshore bars, also known as sandbars are submerged(or partly exposed) ridges of sand or coarse sediment
How are they created?
They are created by waves that operate offshore from the coast. Destructive waves erode sand ffrom the beach.They have a strong backwash which removes sediment and deposits it offshore as bars
Spits
What is it?
Long, narrow feature which extends from the land into the sea, or part way across an estuary.
How is it made?
A spit is made of sand or shingle. Sand or shingle moved along the coast by longshore drift, but if the coastlines suddenly changes direction then sediment will begin to be deposited and build up.
Cuspate Foreland
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How does it form?
It occurs where a coast is exposed to longshore drift from opposite directions. Sediment is deposited at the point where the two meet, which forms a natural triangular shape as it builds up. Vegetation then builds up and helps strength the landform and protect it from storms that could erode
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Barrier Beaches
What is it?
Where a beach or spit extends across a bay to join two headlands up, it forms a barriers or bar e.g. Start Bay in Devon, caused by shingle deposits
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