Term
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Definition
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Start in mountain bowls at ends of valleys: Cirques
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Ice flows down valley to form glaciers, which then can combine with other glaciers
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Occurs in high altitudes, above the snow line, where there is net accumulation of snow
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Alpine glaciers are thinner: 10 to 100 m thick
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Most common on ocean sides of mountain ranges
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Term
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Definition
- Continental Glacier - glacier that spreads out from a central mass of ice.
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Found today in Greenland and Antarctica
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Greenland: up to 3000m thick, 1.7 million sq. km
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Antarctica: up to 4000m thick, 15.5 million sq km
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North America was covered by ice sheet in Pleistocene
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Term
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Definition
- flow over ground due to lubrication of water between ice and ground
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Definition
Debri and material left over by glacier |
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Definition
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Definition
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Definition
formed from the combining of two lateral moraines when glaciers meet |
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Term
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Definition
• Amount of erosion depends on rate of glacial movement
• Thickness of ice
• Amount of rock fragments carried in ice
• Erodibility of rock surface
• Erosional processes
• Plucking
• Abrasion
• These processes produce
• Rock flour - pulverized rock
• Glacial striations - parallel grooves in rock
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Term
Features Created by
erosion of Valley Glaciers |
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Definition
- U shaped valleys – Glacial Valley
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Hanging valleys – Secondary glacial valley
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Paster noster lakes – Series of connected glacial lakes
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Fjords – Flooded glacial Valley
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Aretes – Ridge that separates two glaciers
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Horns – Peak between two or more glaciers
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Cirque – Bowl shaped valley at head of glacial valley
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