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Glacial LandformsPart 1

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Key Questions

What landforms are created by glacial erosion?What landforms are created by glacial deposition?How can glacial features be identified on maps?

Glacial Landforms

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The landforms created by glacial erosion covered in this part are:

Corries Arêtes

Pyramidal peaks

Glacial troughs (U-shaped valley)

Truncated spurs Hanging valleys

Landforms created by glacial erosion

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Snow collects in a natural hollow on the side of a mountain. Over time, further snow collects in the hollow. This extra weight compresses the snow underneath, turning it into ice.

The hollow is deepened and widened by the corrie glacier through the processes of abrasion and plucking.

rock lip

This overdeepening leads to an ‘armchair’ shape characteristic of a corrie and causes a ‘rock lip’ to be formed.

How is a corrie formed?

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Corrie formation

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Diagram of a corrie

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Explain the formation of a corrie

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tarn

bowl-shaped corrie

steep backwall

Example of a corrie: Cwm Idwal