Coastal Features - Landforms

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EROSION – TRANSPORTATION - DEPOSITION

LANDFORMS PRODUCED BY WAVE EROSION

Headland • This is a part of the coastline that juts out into the sea and usually ends in a cliff.

Bay • A wide curved inlet of a sea.

LANDFORMS PRODUCED BY WAVE EROSION

Wave cut notch • The foot of the cliff which is undercut.

Wave cut platform • This is the gently sloping land left on the foot of a retreating cliff.

LANDFORMS PRODUCED BY WAVE EROSION

Cave • A deep hollow produced by the action of the waves usually at the foot of a cliff.

Arch • An opening through a rock.

LANDFORMS PRODUCED BY WAVE EROSION

Stack • A pillar for rock which has been isolated from the cliff due to the erosive nature of the waves.

WAVE CUT PLATFORM

Formation of headlands and bays

Sea attacking a coastline of varying resistance will erode the weaker rock more quickly

The result is that a series of headlands form on the harder rocks………

…..and sheltered bays form in the weaker rocks

HEADLANDS, BAYS AND BEACHES

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a. Waves attack both sides of a headland, producing caves; b. Sometimes these are eroded right through the headland to form arches. c. When the roof of the arch collapses it leaves a pillar or stack; d. When the stack collapses it leaves a stump.

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Development of Old Harry

BLOW HOLES • Caves develop well in jointed rocks as bedding planes are open by abrasion and hydraulic action. If a joint runs from the cave to the cliff top the hydraulic action can eventually force this joint open like a chimney inside the cliff .

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