Image:Diagram showing historical levels of Lake Superior.jpg

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Diagram showing effect of glaciation and post-glaciation unloading on the height of Lake Superior above sea level. From .

Public domain This image is a work of a United States Geological Survey employee, taken or made during the course of the person's official duties. As a work of the United States Government, the image is in the public domain. For more information, see the USGS copyright policy. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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Date/Time Dimensions User Comment
current 11:39, 12 April 2005 450×334 (20 KB) Worldtraveller ( Talk | contribs) (Diagram showing effect of glaciation and post-glaciation unloading on the height of Lake Superior above sea level. From [http://www.cr.nps.gov/history/online_books/754a/sec6.htm]. {{PD-USGov-Interior-USGS}})

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