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How was swanage bay formed?

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Answer:

Swanage Bay is formed by erosion of the soft rock cliffs at the coast, the headlands at either end of the bay are hard rock. This is concordant rock geology, where the bands of hard rock and soft rock run perpendicular to the coast line. Large destructive waves erode the soft rock faster than the hard rock causing the common headland-bay formation. The bay is eroded further to the shape it is today, the beach has build up because of long shore drift (LSD) carrying material across a beach in the direction of the prevailing wind. The swash and back wash cause the material to be moved in a saw-tooth action along the beach. The sand on the beach prevents the soft rock cliffs from eroding as fast and the gentle slope of the beach means there is more deposition from constructive waves.

Contributor:

Michael

First answer by ID1466314945. Last edit by Michael Saunders97. Contributor trust: 2 [recommend contributor ]. Question popularity: 57 [recommend question].

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