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coast deposition

what is a sandspit a long narrow ridge of sand that extends fromm the coast out to sea
how are they formed they form in areas where there is a sudden change in the shape in the coastline
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
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
how are the sandspits stabilised marram grass binds the sediment together. Constructive waves deposit sand on the sandspit also
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
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
what is a salt marsh a dried up lagoon eg. our lady's island co. wexford
Created by: Megan k