glacial erosion is significant
currently 10% ice on Earth, previously 30%
sculpting nature of ice
GLACIERS AND ICE AGES (Chapter 21) - Lecture Outline
Last updated: 05/02/07
Basic considerations
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glacial erosion is significant |
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currently 10% ice on Earth, previously 30% |
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sculpting nature of ice |
1. Glaciation/Global warming and Louisiana
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fertile soils |
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climate change monitors |
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sea level rise |
2. Glaciers - generalizations
3. Morphology of glaciers
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valley glacier |
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cirque glacier |
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fjord glacier |
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continental glaciers |
4. Conversion of snow to ice
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metamorphic rock |
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burial, porosity loss and recrystallization |
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plastic flow |
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basal slip |
5. Glacier size and movement
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mass balance |
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disappearing glaciers |
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calving and icebergs |
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crevasses |
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glacier surge |
6. Glacier - land modification
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glacial striations |
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grooves and polishing |
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rock fluor |
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horns |
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aretes |
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cirques |
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hanging valleys |
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U-shaped valleys |
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fjord |
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tarns |
7. Glacial sedimentation
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Transport
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glacial drift | ||||||||
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till | ||||||||
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tillite | ||||||||
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glacial erratic | ||||||||
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moraines
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outwash | ||||||||
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drumlins | ||||||||
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eskers | ||||||||
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kettles | ||||||||
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varves |
8. Permafrost
9. Hurricanes
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Louis Agassiz and ice ages | ||||||||
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Pleistocene ice age - continental glaciation | ||||||||
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causes of ice ages | ||||||||
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earlier ice ages
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Future - hot or cold? |
