Coastal Landforms from Erosion

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  • Created by: Revisonf
  • Created on: 06-01-14 18:26
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  • Coastal Landforms from Erosion
    • Waves cause most erosion at the foot of a cliff.
      • This forms a wave-cut notch that makes the cliff above unstable.
        • These both make the cliff so unstable that it eventually collapses
          • The parts of the cliff above water are affected mechanical and chemical erosion.
      • The parts of the cliff above water are affected mechanical and chemical erosion.
      • After the cliff collapses, it gets washes away and a new wave-cut notch is created.
        • Repeated collapsing causes the cliff to retreat and a wave-cut platform remains.
          • The rate of retreament depens of the geology of the cliff - if it is made up of soft rock or loose material.
            • Vegetation - cliffs covered in vegetation are more stable as they're kept together.
    • Cliff collapses occur when the force of gravity is stronger than the force holding up the cliff.
    • Mass movement: the movement of rocks down a slope.
      • There are three types:
        • Slides: where material shifts own a straight line
        • Slumps: where materials move down with a rotation.
        • Rockfalls: when materials fall down vertically
    • Some types of rocks are more resistant to erosion than others.
      • Less resistant rocks are eroded quickly and form bays - a slope
      • The resistant rocks are eroded more slowly and form headland - similar to a cliff, hanging out .

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