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Landforms of coastal erosion

Landforms of coastal erosion. Headlands and Bays Cliffs and Wave Cut Platforms Caves, Arches, Stacks and Stumps. Swanage Bay. Example of headlands and bays on the Dorset coastline. Headlands and bays. How are cliffs and wave-cut platforms formed?. Wave-cut platform.

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Landforms of coastal erosion

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  1. Landforms of coastal erosion • Headlands and Bays • Cliffs and Wave Cut Platforms • Caves, Arches, Stacks and Stumps

  2. Swanage Bay Example of headlands and bays on the Dorset coastline.

  3. Headlands and bays

  4. How are cliffs and wave-cut platforms formed?

  5. Wave-cut platform The waves attack the base of the cliff through the processes of abrasion, corrosion, hydraulic action and attrition. Over time the cliff will be undercut and a wave-cut notch is formed. Eventually the cliff becomes unstable and collapses. Further cliff retreat will form a wave-cut platform.

  6. How are caves, arches, stacks and stumps formed?

  7. Caves, arches, stacks and stumps

  8. The formation of caves, arches, stacks and stumps

  9. A Blowhole may form if theerosion at the back of thecavebreaks through the roof to the top of the cliff.This usually happens at hightide in stormy weather. Copy this note!

  10. Geos are formed when caves eroded backwards into a main cliff. Over time the caves begin to get wider and the roof becomes unsupported. • The roof collapses and creates a narrow inlet into the cliff. Geos

  11. Geos & Blow-holes

  12. How waves operate

  13. Why do waves break? Waves are the result of the wind blowing over the sea: as they approach land they break. The bottom of the wave touches the sand and slows down due to increased friction. The top of the wave becomes higher and steeper until it topples over.

  14. Swash and backwash Backwash Swash Backwash is always at right angles to the beach

  15. Why are waves larger in the south west? Wave energy depends on the fetch (the distance over which the wind has blown), the strength of the wind and the length of time over which the wind has blown.

  16. Types of waves

  17. What do you know about waves?

  18. What are sub-aerial processes and why are they important?

  19. The coast is the narrow zone between the land and the sea. It is worth remembering that the landscape will be influenced by processes on the land as well as the sea. Sub-aerial processes include weathering and mass movement. These processes operate on the cliff face to weaken it and provide material for coastal erosion. What are sub-aerial processes?

  20. Impact of sub-aerial processes

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