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A crevasse is a crack or fissure in a glacier or snow field. Falling into a hidden crevasse is a mountaineer's worst nightmare. Falling into a visible crevasse is usually the result of an error in judgement. Anyone planning on walking on glaciers should be trained in crevasse rescue.

As glaciers flow down a mountain, its pace quickens when the slope steepens. When ice flows faster on steeper pitches of ice below slower moving ice above, a crescentic crevasse may form.

Glaciers move slower down the sides than in the centre because of the friction between the ice and walls of the mountain. This speed difference often creates lateral crevasses near the sides of the glacier, pointing up-valley.

Reference

, 5th edition. BooksEnthsiast.com

Natural hazards Glaciology

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CrevasseA crevasse is a crack or fissure in a glacier or snow field. Falling into a hidden crevasse is a mountaineer's worst nightmare. Falling into a visible crevasse is usually the result of an error in judgement. Anyone planning on walking on glaciers should b

Crevasse rescueCrevasse rescue is the process of retrieving a climber from a crevasse in a glacier. Because of the frequency with which climbers break through the snow over a crevasse and fall in, crevasse rescue technique is a standard part of climbing education. The b

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