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COASTS
Coastal weathering and erosion

There are two types of weathering ­ chemical and mechanical

Chemical weathering ­ breakdown of rock by changing its chemical composition
(carbonation happens by chemical weathering in warm, wet conditions)
1) Dissolved in rainwater is carbon dioxide, which makes it a weak carbonic acid
2)…

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Mass movements occur when cliffs collapse; these happen when the force of gravity
becomes stronger than the force supporting it

Slides Slumps Rockfalls




Material moves in straight Material moves in rotation Material moves vertically
line


When erosion happens differently, headlands and bays are formed. This happens because some
types of…

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Where there are parallel bands of hard and soft rock, coves are formed. Coves ae wide, circular
bays with narrow entrances. They form when there are bands of hard and soft rock behind. Where
there is a weak part in the hard rock, a small gap will erode and the…

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Deposition is where material that is being carried is dropped off at the coast. Coastlines build up
when there is a greater rate of deposition than there is erosion. More material is deposited when
there is lots of erosion taking place and there's much transportation of seawater and material into…

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Wave-cut platforms ­ bumpy edges along coast

Sand beaches ­ pale yellow in colour

Shingle beaches ­ pale yellow or white in colour with speckles

Spits ­ beach carrying out to sea with one bit attached to land

Reasons for protecting coastlines

Human reasons
Social Economic
Deaths ­ coastal landforms…

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