Erosion and Landforms

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  • http://www.wiley.com/college/strahler/0471480533/animations/ch19_animations/animation2.html http://www.wiley.com/college/strahler/0471480533/animations/ch19_animations/animation2.html
  • Erosion and Landforms

    1. 1. Lesson ObjectivesThis lesson we will be looking at the process of erosion and how it shapes our coastline.By the end of the lesson you should be able to:• Name the four processes of coastal erosion• Describe what each of these processes is• Explain what landforms result from erosion and why
    2. 2. Hydraulic ActionThe force of the water hitting the cliffs, often forcing air pockets into cracks in the rocks
    3. 3. AbrasionCaused by waves picking upstones and hurling them at the cliff face, wearing it away.
    4. 4. AttritionAny material, but usually rocks and pebbles will become rounder and smaller over time as it collides with other rocks and pebbles.
    5. 5. CorrosionThe dissolving of rocks and minerals by sea water.
    6. 6. HeadlandBay
    7. 7. Headlands and BaysIs all to do with geology!Geology = the type of rockSoft rocks get eroded quickly creating baysHard rocks erode more slowly creating headlands
    8. 8. Headlands and Bays Is all to do with geology! Geology = the type of rock Soft rocks get eroded quickly creating bays Hard rocks erode more slowly creating headlands
    9. 9. Cave, Arch, Stack, Stump
    10. 10. Key WordsHydraulic Action - The force of the water hitting the cliffs, often forcing air pockets into cracks in the rocksAbrasion - Caused by waves picking up stones and hurling them at the cliff face, wearing it away.Attrition - Any material, but usually rocks and pebbles will become rounder and smaller over time as it collides with other rocks and pebbles.Corrosion - The dissolving of rocks and minerals by sea water.
    11. 11. Key WordsCave – a fracture in the rock that has been widened to form a deep hole in the cliffArch – when two caves meet in the middle a gap is formed in the cliffStack – a pillar of rock that is left over when the arch collapses due to gravityStump – A small piece of rock that just sticks up out of the ocean; what is left once the stack falls overGeology – the type of rock

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