| Term | Definition |
|---|
| glacier | A large, long-lasting river of ice that is formed on land and moves in response to gravity. |
| sediment | Small fragments of rock or other materials that can be moved around by wind water or ice. |
| moraine | Accumulated earth and stones deposited by a glacier. |
| cirque | Steep-walled semicircular basin in a mountain. |
| lateral moraine | forms along the sides of a glacier. |
| terminal moraine | eroded rock material dropped at the front of a glacier. |
| till | Unsorted rock material deposited by a glacier. |
| geologic time scale | Timetable of earths history constructed by scientists . |
| U-shaped valley | Valley created by a glacier. |
| V-shaped valley | River gorge. Valley created by a river. |
| hanging valley | Small glacial valley suspended on a mountain above the main glacial valley. |
| glacial polish | Rocks polished to be smooth and shiny by material carried by a glacier. |
| striations | Grooves of scratches found in surface rock that are the result of glacial abrasion. |
| talus | An accumulation of angular rock debris from rockfalls. |
| erratic | A large rock boulder that has been transported by glaciers away from its origin and deposited in a region of dissimilar rock. |
| glacial meadow | A meadow left after a glacier removes all the trees and other large plants. |
| glacial lake | A lake that gets much or all of its water from the melting of glacier ice. |
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