crevasse

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crevasse

(krəvăs`), large crack in the upper surface of a glacierglacier,
moving mass of ice that survives year to year, formed by the compacting of snow into névé and then into granular ice and set in motion outward and downward by the force of gravity and the stress of its accumulated mass.
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, formed by tension acting upon the brittle ice. Transverse crevasses occur where the grade of the glacier bed becomes suddenly steeper; longitudinal crevasses, where the glacier spreads over a wider valley or plain. Marginal crevasses are due to the strain built up when the central part moves faster than the sides.
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crevasse

[krə′vas]
(geology)
An open, nearly vertical fissure in a glacier or other mass of land ice or the earth, especially after earthquakes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

crevasse

1. a deep crack or fissure, esp in the ice of a glacier
2. US a break in a river embankment
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005