Changes to Coasts

• What do sand dunes need to form?


  -sediment

  -aeolian energy

  -large tidal range

  -extensive backshore

  -vegetation succession
• Slumping


  Rapid mass movement which involves a whole segment of the cliff moving down-slope due to its weight
• Rock falls


  a fall of rocks, as from a cliff; often caused by weathering
• Land slides


  the sliding downslope of a mass of land on a mountain or hill side
• Mudflows


  Saturated soil and re, weak rocks flow down a slope

  Soilfluction
• Isostatic


  Land level change, local change

  
  

  Rise in sea levels : subsidence of land due to deposition of material

  
  

  Change in height of the land from ice age and weight of water results in isostatic rebound and increasing height of the land

  England and Wales subsiding by 1mm a year

  
  

  Tectonic activity - water column dislacemen - tsunami
• Eustatic


  sea level change
• Submergence


  Landforms submerge under water
• Emergence


  Landforms that were once under water