Glacial Lake Duluth

From Wikipedia, the free encyclopedia

Glacial Lake Duluth was a proglacial lake that formed in the Lake Superior drainage basin as the Laurentian Glacier retreated. The oldest existing shorelines were formed after retreat from the Greatlakean advance, sometime around 11,000 years B.P. Lake Duluth formed at the western end of the Lake Superior basin. Lake Duluth overflowed south through outlets in Minnesota and Wisconsin at an elevation of around 331 m ASL.

The drawing on this page is accurate but uses the obsolete term, "Valders". Valders was replaced by the term "Greatlakean" when stratigraphic problems forced Valders to be abandoned.

[edit] See also

• Glacial history of Minnesota
• list of prehistoric lakes
• Proglacial lakes of Minnesota

[edit] External links

• "Post-Valders Lake Stages in the Lake Superior Basin", in Glacial and Postglacial Geologic History of Isle Royale National Park, Michigan by N. King Huber, USGS Geological Survey Professional Paper 754-A