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Glaciation

http://www.tmwmedia.com/physical_geography.html Glaciers have had a more profound effect on the surface of the earth than probably any other geological process. This is the one audiovisual aid you SHOULD have to explain the world of glaciers to your students. This video clearly investigates what glaciers do and how they affected most of North America. Watch an excerpt from this fascinating and beautiful video from TMW Media.

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