2.6B Mass movement

• rockfall = occurs on slopes >40', where a rock fragment breaks away and either drops vertically (so it isn't in contact with the cliff) or bounces downslope. 

  -> occurs by mechanical weathering and marine erosion
• rotational slumping =  involves rock failure and movement along a curved rock plane. 

  -> occurs due to weak rocks and unconsolidated material
• Landslides = downslope movement of discrete blocks of rock down a flat/linear slip plane, maintaining contact with the cliff surface throughout. 

  -> occurs via rainstorm events which reduces resistance
• Flows = occur when unconsolidated fine grained sediment, mix with large volumes of water