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1 May 2011
Iceberg Drag Marks on the Bottom of Glacial Lake Agassiz
The linear streaks shown on the aerial photograph to the right are believed to have been gouged by icebergs dragging on the bottom of wind swept Glacial Lake Agassiz. The streaks (Lat. 48 50′ 45″ N; Lon. 97 16′ 30″ W) are up to several miles long, hundreds of feet wide and several feet deep. Glacial Lake Agassiz, named after the 19th Century naturalist Louis Agassiz, was the largest of …