Coastal erosion, transportation and deposition.

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5 types of coastal erosion
Hydraulic power, Corrasion, Abrasion, Solution, Attrition.
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Hydraulic Power
Power of waves when smashed onto a cliff which forces air into the cliff holes. This causes the rock to crack and eventually the rock breaks apart.
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Corrasion
Fragments of rock are picked up by the waves and hurled at the cliff. The rocks act as erosive tools by scraping and gouging the rock.
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Abrasion
The 'sandpapering' of pebbles grinding over rocky platform causing it to become smooth.
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Solution (erosion)
Vulnerable rocks dissolved by seawater, e.g. Limestone and Chalk (form cliffs in UK)
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Attrition
When the rock fragments carried by the sea knock against one another, causing them to become smaller and more rounded.
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4 types of coastal transportation
Solution, suspension, saltation, traction.
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Solution (transportation)
Dissolved chemicals often derived from limestone or chalk
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Suspension
Particles carried (suspended) within the water.
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Saltation
A 'hopping' or 'bouncing' motion of particles too heavy to be suspended.
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Traction
Large pebbled rolled along seabed.
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Coastal deposition
Takes place where water flow slows down and energy is reduced. Sediment can no longer be carried or rolled and must be deposited. Explains presence of beaches in bays and lack of beaches at headlands (where wave energy is much greater)
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Longshore Drift
Waves approach beach at an angle, sediment moved along beach by longshore drift. At backwash, sediment carried back down beach as wave draws back.
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Other cards in this set

Card 2

Front

Power of waves when smashed onto a cliff which forces air into the cliff holes. This causes the rock to crack and eventually the rock breaks apart.

Back

Hydraulic Power

Card 3

Front

Fragments of rock are picked up by the waves and hurled at the cliff. The rocks act as erosive tools by scraping and gouging the rock.

Back

Preview of the back of card 3

Card 4

Front

The 'sandpapering' of pebbles grinding over rocky platform causing it to become smooth.

Back

Preview of the back of card 4

Card 5

Front

Vulnerable rocks dissolved by seawater, e.g. Limestone and Chalk (form cliffs in UK)

Back

Preview of the back of card 5
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