Processes of Erosion

Processes of Erosion

1. Attrition

   • Rocks and boulders are already eroded from the cliffs
     • are broken down into smaller pieces and rounded

2. Abrasion

   • The wearing away of cliffs
     • By sand and boulders hurled against them by waves
       • The most effective method of erosion

3. Hydrolic Action

   • When a parcel of air is trapped or compressed
     • either in a joint in a cliff or between a breaking wave and a cliff
       • then the increase pressure may over time weaken and break off pieces of rock

4. Solution

   • This involves dissolving limestone
     • by carbonic acid in sea water
       • and the evaporation of salts to produce crystals
         • which expand as they form and cause the rock to disintegrate