Processes of glacial erosion
- Created by: darcie_cl
- Created on: 26-02-14 19:11
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- Processes of glacial erosion
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- 1. Water enters small crack
- 2. Water enters cracks during the warmer day and freezes during the colder night
- As water turns to ice it expands and exerts pressure on surrounding rock
- When temperatures rise, ice melts and pressure is released
- Repeated freezing and thawing widens the cracks and causes pieces of rock to break off
- ABRASION AND PLUCKING
- Angular rock fragments produced by freeze-thaw are vital tools for glacial erosion
- Fragments work their way under ice enabling ice to grind away at the valley floor and sides
- Abrasion
- Material carried by a glacier rubs against the sides and floors of the valley
- Plucking
- As the glacier moves the bottom layers of ice stick to rock and landscape - ripping rocks out of the ground
- Angular rock fragments produced by freeze-thaw are vital tools for glacial erosion
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