AS glacial erosion and deposition landforms
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Created by:
rgamesby on October 29, 2011
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A resource for A level Geography from http://www.coolgeography.co.uk
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18 terms
Terms | Definitions |
|---|---|
 Cirque | a steep-walled semicircular basin in a mountain |
| Arete | a sharp narrow ridge found in rugged mountains |
| Pyramidal peak | Where three or more corries formed back to back leaving one peak with 3 sharp ridges. E.g. Matterhorn. |
| U shaped trough | a valley with steep or vertical walls and a broad, rather flat floor formed by the movement of a glacier through a stream valley |
| Truncated spur | Triangular-shaped cliff produced when a spur of land that extends into a valley is removed by the great erosional force of a valley glacier. |
| Roche Moutonnee | known as sheep rocks, this glacier feature is formed when glacial ice advances over outcrops of bedrock. The side facing the glacier may be polished and smooth, but the downward side is left steep and jagged due to glacial plucking action. |
| Crag and tail | A glacially eroded hill with a tail of till formed down-glacier of it |
| Drumlin | a long mound of till that is smoothed in the direction of the glacier's flow |
| Basket of eggs topography | Where many drumlins are found together |
| Hanging valley | small abandoned glacial valley suspended on a mountain above the main glacial valley |
| Ribbon lake | long narrow lake in a part of the valley cut deeper by the glacier |
| Moraine | accumulated earth and stones deposited by a glacier |
| Medial moraine | are formed when two advancing valley glaciers come together to form a single ice stream |
| Lateral moraine | moraine that forms along the sides of glaciers |
| Terminal moraine | A glacial hill or ridge deposit along the line that marks the end of a glaciers forward movement (then it retreated) |
| Recessional moraine | Marks the pauses in the retreat of a glacier |
| Striations | scratches left on rocks and bedrock by glacier movement |
| Erratics | isolated boulders left behind by a glacier |
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