Ch. 13 Terms

Ch. 13 Terms - NR 130 Key Terms Chapter 13 Firn: when snow...

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NR 130 Key Terms Chapter 13 Firn: when snow survives through a summer, it converts to rounded ice grains Glacier: massive, long-lasting, moving mass of compacted snow and ice Alpine Glaciers: glacier that forms in mountainous terrain Ice sheet or Continental glacier: a glacier that forms a continuous cover of ice over areas of 50,000 square kilometers or more and spreads outward under the influence of its own weight (continuous glacier, ice cap) Basal slip: movement of the entire mass of a glacier along the bedrock Plastic flow: a permanent change in the original shape of a solid that occurs without fracture Crevasses: a fracture or crack in the upper 40 to 50 meters of a glacier Ice fall: a section of a glacier consisting of crevasses and towering ice pinnacles Zone of accumulation: the higher-altitude section of an alpine glacier where more snow falls in winter than melts in summer and where snow accumulates from year to year. There the glacier’s surface is covered by snow year round. Zone of ablation: the lower-altitude part of an alpine glacier where more snow melts in summer than accumulates in winter. When the snow melts, a surface of old, hard glacial ice is left behind
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This note was uploaded on 03/30/2008 for the course NR 130 taught by Professor Theodorechamberlain during the Spring '07 term at Colorado State.

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Ch. 13 Terms - NR 130 Key Terms Chapter 13 Firn: when snow...

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