Proglacial Lakes of Minnesota - Glacial Lake Grantsburg

Glacial Lake Grantsburg

Lake Grantsburg, formed when the Grantsburg Sublobe of the Des Moines Lobe blocked southward drainage of the ice-free land to its north. It extended from St. Cloud east-northeast to Grantsburg, Wisconsin, whence its outflow ran south along the east front of the ice sheet down the valley of the Saint Croix River.

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