8.3 Glaciers
Name:
Glacier:
Glaciers currently cover about 10% of Earth's surface. That percentage is dropping.
Glaciers are the most powerful agent of erosion.
Glaciers form when annual snowfall doesn't completely melt and the snow layer
increases as the years pass. The lower snow then recrystallizes into ice.
2 Types of Glaciers
Valley Glaciers:
Where can valley glaciers be found?
Continental Glaciers:
Where can continental glaciers be found?
Clues of glacial movement
Striations:
Grooves:
Valley Glacier Formations
Cirques:
Cirques can fill with water and become cirque lakes.
Arête:
Horn:
Moraine:
Moraines can form damns and form lakes.
Outwash Plain:
Drumlins:
Eskers:
Kettle Lake:
Questions
1. How do valley glaciers form?
2. How do continental glaciers form?
3. How does a kettle lake form?
4. What evidence of past glaciers can be found on Earth today?
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