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Glacial Erosion
Lesson 3 pg.81
| Term | Definition |
|---|---|
| Glacier | Geologists define glacier as any large mass of ice is a that moves slowly over land. (pg.81) |
| Continental Glacier | A continental glacier is a glacier that covers much of a continent or large island (pg.81) |
| Ice Age | Many times in the past, continental glaciers have covered larger parts of Earth's surface. (pg.81) |
| Valley Glacier | A valley glacier is a long, narrow glacier that forms when snow and ice build up in a high mountain valley.(pg.82) |
| Plucking | As a glacier flows over the land, it picks up rocks in the process called plucking. (pg.83) |
| Till | The mixture of sediments that a glacier deposits directly on the surface is called till. (pg.84) |
| Moraine | The till deposited at the edges of a glacier forms a ridge called a moraine. (pg.84) |
| Kettle | A kettle is a small depression that forms when a chunk of ice is left in glacial till. |