Coastal Features - Landforms

EROSION – TRANSPORTATION - DEPOSITION

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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.

Arch • An opening

through a rock.

Cave

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

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.

LANDFORMS PRODUCED BY WAVE EROSION

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

1. a.       Waves attack both sides of a headland, producing caves;

2. b.       Sometimes these are eroded right through the headland to form arches.

3. c.       When the roof of the arch collapses it leaves a pillar or stack;

4. 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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