Coastal land forms

These land forms are usually features which occur over thousands of years, and are a product of the sea eroding hard rock head lands. (See headlands and bays revision card)

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  • Created by: Annis
  • Created on: 13-03-14 18:48

Cracks/Joints

The waves crash against the hard rock, eroding it with Hydraulic action, atrittion and Corrasion over time.

This causes Cracks and joints to form in the cliff face

The repeated erosion widens these cracks

which leads to......................

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Caves

When the tide continues to erode the cracks in the cliff face, they are widened, eventually forming a cave. 

The tide will continue to erode and deepen the cave untill.......

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Arch

An arch is formed! This is when the tide erodes the back of the cave completly.

The supports or pillars either side of the arch are eroded by the sea untill they become too weak to support the top of the arch, this means it collapses into the sea.

This leaves a...............

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Stack

Stack! A stack stands alone, away from the headlands, like the Needles in the Isle of Wight.

The stack's base is continually eroded until it collapses leaving a..........

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Stump

A stump is a broken/fallen stack and can be covered by the sea at high tide.

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Examples

Arch:

Durdle's door, Dorset

Stack and stump:

Old Harry and Old Harry's wife, Dorset

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