Geography Landforms

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  • Topic: Glacier, Glaciology, Water
  • Pages : 4 (1071 words )
  • Download(s) : 26
  • Published : April 11, 2013
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Student Notes Questions
-Landforms produced by glacial erosion
5. Below in a sketch of a corrie post-glacial.
Over-deepened basin caused by erosion due to rotational flow. Post-glaciation, a corrie may be filled with a tarn. This is water that has been collected in the hollow; it is dammed by the rock lip. Over-deepened basin caused by erosion due to rotational flow. Post-glaciation, a corrie may be filled with a tarn. This is water that has been collected in the hollow; it is dammed by the rock lip. Moraine may be left over after glaciation. It is the material that has been plucked and eroded from the hollow and deposited by the glacier. Moraine may be left over after glaciation. It is the material that has been plucked and eroded from the hollow and deposited by the glacier. Steep back wall created through the process of plucking and abrasion. Steep back wall created through the process of plucking and abrasion.

The Rock Lip is a feature of a corrie, and is formed during glaciation, where the ice was thinner, therefore less erosion took place. The rock lip dams the tarn. The Rock Lip is a feature of a corrie, and is formed during glaciation, where the ice was thinner, therefore less erosion took place. The rock lip dams the tarn.

6. How is a corrie formed?
Stage 1: The hollow on the side of a mountain is likely to have been deepened initially by nivation. Stage 2: As snow accumulates in the hollow, it turns to ice under the pressure of the layers of snow above. The weight of the ice causes it to begin to rotate and move. Stage 3: As the ice pulls away from the back wall, plucking occurs, making the back wall steeper. Stage 4: Freeze thaw weathering causes the rocks debris to situate underneath the glacier, this enables plucking to occur and is used by the glacier to abrade the floor of the hollow. This over-deepens the corrie basin. Rotational flow also causes further erosion of the corrie basin. Stage 5: At the back wall of the corrie, a large...
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