Geology Final Set 5
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Created by:
ronaldaddai on April 18, 2010
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10 terms
Terms | Definitions |
|---|---|
 Glacier Surge | occurs when water gets trapped in a glacier and can't get out, Buildup of pressure lubricates the base and allows the glacier to flow rapidly until water can get out. |
| Glacial Striations | Occurs when small fragments of embedded rock scrape underlying bedrock and produce long, nearly parallel scratches as basal sliding occurs |
| Cirques | bowl shaped and found at the glaciers head |
| Arete | Two cirques on opposite sides of a mountain meet and form a sharp crested ridge |
| Esker | Sediment left behind in a raised be when a glacier subsequently retrates |
| Kettles | Pits and pocket marks left behind by blocks of ice embedded in the glacial debris. |
| Periglacial | Distinctive landforms resulting from intense frost action and large annual range in temperature |
| Active layer | A thin layer near the surface that melts during the summer and freezes during the winter |
| Paleosols | Represent former land surfaces and provide information about climate and weather at the time they were formed |
| Ice core | preserves small bubbles of ancient atmosphere and tell us the exact chemical composition of the atmosphere up to 160,000 years ago |
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