Erosion types

• Erosion is the removal, breaking down or wearing away of rocks/ material.
• Erosion =

  is the wearing away of rock along the coastline, river bed and river banks.
• Coastal Erosion

  The loss of land and removal of sediment from the coastline due to the actions of the ocean
• 5 types of Erosion

  1. Hydraulic action 
  2. Abrasion 
  3. Attrition 
  4. Solution 
  5. Corrasion
• Hydraulic action

  This is when waves crash against the cliff. Air becomes trapped in the cracks in the rock and causes the rock to break apart.
• Abrasion

  This is when pebbles grind along a rock platform, river bed much like sandpaper. 

  Over time the rock becomes smooth.
• Attrition

  This is when rocks that the sea is carrying knock against each other. 

  They break apart to become smaller and more rounded.
• Solution

  This is when sea water dissolves certain types of rocks.

  In the UK, chalk and limestone cliffs are prone to this type of erosion.
• Corrasion

  This is when destructive waves pick up beach material (e.g. pebbles) and hurl them at the base of a cliff. Over time this can loosen cliff material forming a wave-cut notch.