mass movement

• What is mass movement and why does it occur?

  Mass movement is the downward movement of rock, mud or soil due to gravity. It typically occurs when a lot of water is present - for example, after heavy rainfall.
• Describe the process of sliding.

  Material slides quickly downwards in a relatively straight line.
• Describe the process of slumping.

  Material slides with a rotation over a curved slip plane.
• Describe the process of rock fall.

  Rocks break apart and fall, often as a result of freeze-thaw weathering.