Question
Describe Plucking as a process of glacial erosion.
Answer
- Pressure of overlying mass of ice cause freeze thaw action at the bottom.
- Melt water enters the cracks and joint on the bed rock.
- As the water freezes it exerts pressure in the cracks enlarging them.
- Enlargement of cracks leads to disintegration of the rocks.
- The broken rocks are then embedded or frozen into the ice.
- As the ice moves it tears out the frozen rocks from the parent rocks a process
called plucking.
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