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Geo 101 final review
Glaciers
| Question | Answer |
|---|---|
| How much of the land surface is covered by ice? | 10% |
| What are the two types of glaciers? | Valleys and continental |
| All processes that produce snow, ice, or water from a glacier or snowfield | Ablation |
| Rate of accumulation versus the rate of glacial wastage | Glacial ice budget |
| If all Earth’s ice shelves were to break off into the ocean over the next few years, with no additional complications, sea level would not change | Principle of Isostacy |
| Grooves created by rocks scratching against bedrock at the base of a glacier | Striations |
| Steep upper walls grading to a nearly flat floor | U-shaped glaciated valley |
| An amphitheater-shaped hollow formed at the head of a valley glacier | Cirque |
| A glacial valley flooded with seawater | Fjord |
| Accumulation of rocky, sandy, and clayey material carried by the ice and deposited | Moraines |
| Permanently frozen soil | Permafrost |
| There is evidence that the Late Precambrian glaciation (750-600 million years ago) extended to the equatorial regions | Snowball Earth hypothesis |