The formation of caves, arches and stacks

Wave erosion along a line of weakness on the headland to form a notch
The notch is further eroded to form a cave
The cave is continually eroded until a hole is cut through the headland and an arch is formed.
Further erosion of the arch causes it to collapse , leaving behind the stack which is a left standing in the sea.

the features of Cave, Arches and Stacks

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