Educational Series 7. Geologic History of Minnesota Rivers
A glance at a glacial map of the Great Lakes region reveals that all of Minnesota was glaciated at some time, and all but the southeastern and southwestern corners were covered by the last ice sheet, which culminated about 20,000 years ago. Thus all the existing river courses in the state, except th...
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| Format: | Report |
| Language: | English |
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Minnesota Geological Survey
1990
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| Online Access: | http://purl.umn.edu/57272 |