erosion

• marine erosion is the removal of material by waves
• hydraulic action


  when waves hit the side of the cliff

  energy causes rocks to break down
• attrition 


  rocks hit against each other and break each other down
• abrasion


  rocks are thrown at cliff

  rocks scrapes against the cliff
• solution


  dissolved rocks
• rate of erosion depends on

  • waves - strength, frequency
  • weather - frequency of storms
  • geology of coastline