Geography WJEC landforms

Coastal land forms from erosion


Headlands are usually made of resistant rocks. Waves crash into these headlands and enlarge the cracks, through hydraulic action, this repeated erosion causes a cave to be formed.

Continued erosion deepens the cave and causes it to form an arch. E.g. Durdle door. Erosion continues to wear away the rock until a stack is formed. E.g. Old Harry

Stacks are then eventually worn away to give a stump. E.g. Old Harry's wife.


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