Evidence for its existence includes the Campbell B
Evidence for its existence includes the Campbell Beach Ridge, the Blanchard and Herman beaches and the grooves in the Souris and Red River valleys.  Other proofs are the topography of the Sheyenne and Assiniboine Rivers.  It drained into Hudson Bay after the melting of the Laurentide Ice Sheet, but its remnants were left in North Dakota, Saskatchewan, Ontario, Minnesota and Manitoba.  FTP, identify this largest of the glacial lakes, which was named for a 19th century Swiss geologist.
Evidence for its existence includes the Campbell Beach Ridge, the Blanchard and Herman beaches and the grooves in the Souris and Red River valleys.  
Lake Agassiz