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January 30, 2014

North Alsek Glacier Retreat-Lake Formation, Alaska

North Alsek Glacier comparison in 1984 and 2015 Landsat images.  Illustrating the formation of proglacial lake due to glacier retreat. Red arrow is the 1984 terminus and yellow arrow 2013 terminus.  Point A is and island.  The Alsek Glacier is a large glacier draining into Alsek Lake and the Alsek River. The first glacier upriver of Alsek Glacier flowing from the east and ending on the Alsek River valley floor …