Glacial Rivers from Melt Waters
Mississippi River Valley: The River Warren, the largest of Minnesota’s glacial rivers, was five miles across in some places. Waters from Glacial Lake Agassiz, Glacial Lake Grantsburg, and Glacial Lake Duluth formed the deep valley of the Mississippi River Valley when large quantities of glacial lake melt waters rushed through the area. Sorin’s Bluff and Barn Bluff were islands in the great glacial river. The present day Mississippi River is comparatively tiny as it meanders through the large valley carved by the mighty glacial water flows. Although the enormous glacial River Warren is no more, material from the Minnesota River Valley continues to be deposited in the Mississippi and Lake Pepin.