Flashcards
Differential Erosion
Cards in this deck (6)
- 1What's the difference between permeable and impermeable rocks? Give examples of eachPermeable: allow water to flow through them- many sandstones and limestones
Impermeable: do not allow groundwater flow - clay, mudstones and most igneous and metamorphic rocks - 2What does groundwater flow do?Weakens the rock by removing the cement that binds sediment in the rock together
- 3What can groundwater flow create within cliffs? Define this wordHigh pore water pressure - the pressure water experiences at a particular point below the water table due to the weight of water above it
- 4What can high pore water pressure and groundwater flow do to the unconsolidated sediments on the cliff top?Cause them to slump
- 5What can water emerging from below ground onto a cliff face at a spring do?Run down the cliff face and cause surface runoff erosion
- 6Name the 3 features that differential erosion can presentOverhanging of resistant rock
Wave-cut notches of weak layers
Resistant rock- bench feature at the cliff base
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- AS level Geography Flashcards on Differential Erosion, created by Hana Konig on 24/04/2018.
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- Hana Konig
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