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| Courtesy of alaska.org |
Me and my wife visited the Harvard Glacier at the head of
the College Fjord in Alaska. This type of glacier is known as a valley glacier
or alpine glacier. Alpine glaciers start on mountains in bowl shaped hollows called a cirque. Then the ice slowly flows out into a valley and forms the alpine glacier.
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| Courtesy of summitpost.com |
The dark lines that you see are called medial moraines. consists of a long, narrow line or zone of debris formed when lateral moraines join at the intersection of two ice streams; the resultant moraine is in the middle of the combined glacier. It is deposited as a ridge, roughly parallel to the direction of ice movement.
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