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Glaciers & Erosion. Glaciers: What are they? very powerful agent of erosion mass of moving ice How are glaciers formed? when snow and ice accumulate to.

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Presentation on theme: "Glaciers & Erosion. Glaciers: What are they? very powerful agent of erosion mass of moving ice How are glaciers formed? when snow and ice accumulate to."— Presentation transcript:

1 Glaciers & Erosion

2 Glaciers: What are they? very powerful agent of erosion mass of moving ice How are glaciers formed? when snow and ice accumulate to a great enough thickness and move down slope due to gravity.

3 Types of Glaciers: Alpine Glacier- formed in mountainous regions. Alpine Glacier- formed in mountainous regions. Continental Glaciers- covers large land areas. (Greenland & Antarctica) Continental Glaciers- covers large land areas. (Greenland & Antarctica)

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5 Norris & Taku Glaciers, Tongass National Forest, Alaska.

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7 How do glaciers move? on average, glaciers only move approx. 100 meters per year…some more, some less. Basal Slip Internal Plastic Flow

8 Glacial Features and Landforms: crevassesicebergscirquearêteshorn hanging valley

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12 Canol Mountain Cirque Glacier

13 Hanging Valley National Park New Zealand

14 Glacial Features Left From Deposition: erraticsmoraineskettles great lakes salt lakes fjords

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16 Erratic from a glacial ice sheet, Canada.

17 Fjord- formed from glacier filling up with sea water.

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