Dynamic Planet/Glaciers

A glacier is a large body of ice. They are made from freshwater. Glaciers originate on land, but can flow into the sea. They are made by an accumulation of ice and snow. Glaciers can leave many unique landscapes in their trail, including the formation of new lakes. The deposited material a glacier leaves are called "moraines" or "glacial till". The front of a traveling glacier is called the "glacier head" while the back is called the "terminus. On earth, 99% of glacier ice is found in the polar regions.



Glaciers are a large part of erosion and deposition. They grind rock as they pass and also pick some sediment up and deposit them on the way. Glaciers can change V-shaped valleys formed by rivers into U-shaped valleys.

Resources

 * http://en.wikipedia.org/wiki/Glacier
 * http://scioly.org/w/images/7/78/Dynamic_planet_glaciers_smith.pdf
 * http://nsidc.org/glaciers/