Weathering, mass movement

• Freeze thaw weathering

  Water enters cracks in the rock

  When the temperature drops, the water freezes and expands and causing the crack to widen

  The ice melts and water makes its way deeper into the cracks

  The process repeats itself until the rock splits entirely
• Biological weathering

  1. Plant roots can get into small cracks in the rock
  2. As the roots grow, the cracks become larger
  3. This causes small pieces of rock to break away
• Chemical weathering

  Rain and seawater can be a weak acid. The rocks can become dissolved by the acid in water
• Rockfall - Bits of rock fall off the cliff face
• Mudflow - saturated soil flows down a slope
• Landslide - large rocks slide downhill
• Rotational slip - saturated soil slumps down a curved surface