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Cubangbang #132220
Cubangbang's 8A Ch. 20 Glaciers Stack #132220
| Question | Answer |
|---|---|
| Glacier | A large mass of ice flowing under the influence of gravity. |
| Snowfield | A large expanse of snow-covered terrain above the snow line. |
| Snowline | The lower edge of the snow field. |
| Accumulation zone | The area on the glacier above the snowline that accumulates size. |
| Wastage zone | the zone of a glacier that melts away, this is below the snowline. It is also known as the ablation zone. |
| Equilibrium line | An imaginary line on a glacier that separates the accumulation zone from the wastage zone. It is essentially the same line as the snowline. |
| Terminus | The lowest end, or the front of a glacier. |
| Valley glacier | A glacier found in a narrow valley surrounded by mountains. |
| Ice sheet | A thick layer of glacial ice covering an extensive area. |
| Icecap | A thick, widespread, and permanent cover of glacial ice on a flat landmass. |
| Iceberg | A large piece of ice that broke off a glacier. |
| Calving | The process of iceberg formation by the break-up of a glacier. |
| Zone of fracture | The top layer of the glacier extending to about 50m that is made of brittle ice. |
| Zone of flow | The layer of ice crystals that can flow and change shape, below the zone of fracture, that passes over terrain even though the glacier remains solid. |
| Crevasses | A deep fissure in a glacier. |
| Surge | A sudden increase in the speed of glacial movement. |
| Icefall | Glacial ice flowing down a steep incline or cliff from a hanging valley into a deeper valley or the ocean as would a waterfall. |
| Hanging valley | Small valleys that enter glaciated valleys from high on its sides. |
| Tarn | A small pond or lake in a glaciated mountain valley that has no outlet. |
| Horn | A jagged mountain peak left when glacial erosion forms three or more cirques. (ex. Matterhorn in the Swiss Alps.) |
| Fiord | A glacially deepened inlet or arm of the sea characterized by steep-sided walls. |
| Varve | A thin layer of sediment that forms on the bottom of lakes that are fed by glacial melt water. |
| Ice age | A time in the earth’s history during which much of the higher latitudes in both the Northern and Southern hemispheres were covered by glaciers. |
| Loess | A thick deposit of windblown dust and silt. |
Created by:
jcubangbang
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