Mass movement

• Mass movement 

  Is the downhill movement of cliff material under the influence of gravity
• 4 types of mass movement 

  1. Rockfall 
  2. Landslide 
  3. Mudslide 
  4. Slumping 
• Rockfall  

  A rockfall involves fragments of rock breaking away from the cliff face, often due to freeze-thaw weathering.
• Landslide

  Large blocks of rock slide downhill.

  This causes erosion at the base of the cliff.
• Mudslide

  Mudslides occur when saturated soil and weak rock flows down a slope. These typically occur where cliffs are made up of boulder clay.
• Rotational slip (slumping)

  Saturated soil slumps down a curved surface.