Coastal Erosion <ul><li>We already know how waves erode the coastline. </li></ul><ul><li>The aims of today is to look at s...
Erosional Features <ul><li>The more powerful the waves – the more energy they have – and the softer the rock, the faster t...
Waves (just like rivers) erode the land by one of 4 processes <ul><li>The constant force of waves crashing on the shore da...
cliff
crack
cave
arch
pillar
stack
stump
Wave cut notch  or  wave cut platform (sometimes may be called a reef)
coastal   retreat as the processes continues the cliff/headland continues to retreat (move backwards)
Case Studies <ul><li>Make sure you can name and locate examples for this type of erosional landform. </li></ul><ul><li>The...
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Erosional landscapes

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Erosional landscapes

  1. 1. Coastal Erosion <ul><li>We already know how waves erode the coastline. </li></ul><ul><li>The aims of today is to look at some of the landforms they create through; </li></ul><ul><ul><ul><ul><li>Erosion </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Deposition </li></ul></ul></ul></ul><ul><ul><ul><ul><li>and transportation </li></ul></ul></ul></ul>
  2. 2. Erosional Features <ul><li>The more powerful the waves – the more energy they have – and the softer the rock, the faster the erosion will be. </li></ul>
  3. 3. Waves (just like rivers) erode the land by one of 4 processes <ul><li>The constant force of waves crashing on the shore damages it. This is called hydraulic action . </li></ul><ul><li>Waves bring with them bits of rock and sand. These help to grind down cliffs. This is called abrasion . </li></ul><ul><li>Waves cause rocks and pebbles on the shore to smash into each other and break down. This is called attrition . </li></ul><ul><li>Acids contained in sea water will slowly dissolve certain types of rock. This is called corrosion or solution . </li></ul>
  4. 4. cliff
  5. 5. crack
  6. 6. cave
  7. 7. arch
  8. 8. pillar
  9. 9. stack
  10. 10. stump
  11. 11. Wave cut notch or wave cut platform (sometimes may be called a reef)
  12. 12. coastal retreat as the processes continues the cliff/headland continues to retreat (move backwards)
  13. 13. Case Studies <ul><li>Make sure you can name and locate examples for this type of erosional landform. </li></ul><ul><li>The most famous are; </li></ul><ul><ul><li>Old Harry Dorset </li></ul></ul><ul><ul><li>The 12 Apostles, Eastern Australia </li></ul></ul>

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