Geography Mass movement 10.2
- Created by: jodie.g
- Created on: 23-05-18 18:53
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- Mass movement
- Sliding
- Generic term for downhill movement of large amount of rock/soil and mud
- Occurs on steep cliffs previously weakened by weathering
- 1.Heavy rain infiltrates soil and percolates down into the rock
- 2.Heavier saturated mass falls away along a distinct slip plane (line of weakness)
- Slides happen quickly
- Starts by tearing away vegetation on top of cliff
- descent is lubricated by wet rocks below
- Rock falls
- Bare, well jointed rocks are prone to freeze-thaw weathering-rocks lose contact with cliff face.
- At the bottom of the cliff they fan out to form a scree slope.
- Common on vertical cliffs.
- Slumping
- A slide takes a straight course but a slump has a concave slip plane
- material is rotated backwards into the cliff face as it slips
- Sliding
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