DescriptionPlate 21 - Glacial Lake Algonquin and its Correlatives (USGS 1915).JPG
English: Map of Glacial Lake Algonquin and its Correlatives (USGS 1915)
Date
Source
The Pleistocene of Indiana and Michigan and the History of the Great Lakes; U.S. Geological Survey, Monograph, #53; Government Printing Office; Washington, D.C.; 1915