This image was uploaded in the JPEG format even though it consists of non-photographic data. This information could be stored more efficiently or accurately in the PNG or SVG format. If possible, please upload a PNG or SVG version of this image without compression artifacts, derived from a non-JPEG source (or with existing artifacts removed). After doing so, please tag the JPEG version with {{Superseded|NewImage.ext}} and remove this tag. This tag should not be applied to photographs or scans. If this image is a diagram or other image suitable for vectorisation, please tag this image with {{Convert to SVG}} instead of {{BadJPEG}}. If not suitable for vectorisation, use {{Convert to PNG}}. For more information, see {{BadJPEG}}.
DescriptionDiagram showing historical levels of Lake Superior.jpg
English: Diagram showing effect of glaciation and post-glaciation unloading on the height of Lake Superior above sea level.
Source
From:
POST-VALDERS LAKE STAGES IN THE LAKE SUPERIOR BASIN
Geological Survey Professional Paper 754-A
Glacial and Postglacial Geologic History of Isle Royale National Park, Michigan
United States Geological Survey
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}}