Dynamic Planet: Coasts

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Coastal Processes

Hydraulic Action: Water is forced into cracks in the cliff, compressing the air. As the wave retreats the compressed air blasts out, forcing the rock apart.

Abrasion:  Sediment is thrown against the cliff by the waves. This wears the cliff away and chips off bits rock.

Attrition:  Loose sediment from hydraulic action and abrasion, are swirled around by the waves constantly colliding . This wears them down, making them rounder and smaller.

Coastal Landforms

  • Wave power is concentrated at the base of the cliff, where abrasion acts forming a wave cut notch
  • Above


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