"Margerie glacier is about 21 miles long from its origins in the Fairweather Mountain Ranger in elevations exceeding 9000 feet. Due to the abundance of snow in the mountains and the steepness of slope, the ice of Margerie Glacier flows relatively quickly, estimated to flow about 2000 feet per year, or about 6 feet per day. The glacier does not expand out into the fjord since it rests on an underwater ledge, so the ice falls into the ocean in a process called calving, breaking into icebergs. The icebergs become resting spots for harbor seals, sea otters, black-legged kittiwake gulls and other birds."

www.nps.gov/places/margerie-glacier.htm

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