coast deposition
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| what is a sandspit | a long narrow ridge of sand that extends fromm the coast out to sea
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| how are they formed | they form in areas where there is a sudden change in the shape in the coastline
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| why are they formed | the change in shape disrupts the process of longshore drift causing sediment to build up and deposit in a single area
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| continued deposition causes the spit to grow across the bay until it reaches an area where currents and tides remove more sediment than longshore drift deposits
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| how are the sandspits stabilised | marram grass binds the sediment together. Constructive waves deposit sand on the sandspit also
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| what is a tombolo | as a result of wave refraction and a change in wind direction the tip of the sandspit bends inwards and joins an island called a tombolo
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| what is a baymouth bar | when a spit extends across the mouth of a bay , which can eventually block off the bay forming a lagoon
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| what is a salt marsh | a dried up lagoon eg. our lady's island co. wexford
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Created by:
Megan k
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