processes in glaciers

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3 processes are erosion, deposition and transportation

erosion

  • abrasion- glacier scrapes material against the valley sides widening and deepening the valley.
  • plucking- meltwater gets into cracks in rocks and freezes this sticks the rock to the ice. as  the glacier moves away the rock is pulled with the glacier, ********* the rocks away.

factors that effect the speed of erosion

  • speed of ice movement- the faster it moves the more erosion takes place
  • temperature of cover ice- warm based glaciers move faster due to a  more lubricated base meaing it can move faster, so erosion can happen quicker
  • ice thickness- the thicker the ice the greater the erosion because thw weight of the ice will create more pressure melting the base and lubricating it, allowing it to move quicker.
  • debris- more debris means there is a greater load to ther is more erosion (abrasion)

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