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 transcript:

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 a great enough thickness and move down slope due to gravity.

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)

Norris & Taku Glaciers, Tongass National Forest, Alaska.

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

Glacial Features and Landforms: crevassesicebergscirquearêteshorn hanging valley

Canol Mountain Cirque Glacier

Hanging Valley National Park New Zealand

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

Erratic from a glacial ice sheet, Canada.

Fjord- formed from glacier filling up with sea water.