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Authors

Charles Keyes

Document Type

Research

Abstract

As occupying the middle of the main lobe of the Ashawa glaciation, the upper Des Moines River held strategic position in one of the strangest drainage recoveries and reversals, during ice-cap retreat, that has ever been recorded. While melting of this Keewatin ice-cap, of the Last Glacial cycle, was going on. the Des Moines River played a curious part. It carried off the major volume of melt-waters for an interval of 300 years, until the ice had melted back to Blue Earth, Minnesota, on the drainage divide between the Des Moines and the Minnesota rivers.

Publication Date

1938

Journal Title

Proceedings of the Iowa Academy of Science

Volume

45

Issue

1

First Page

163

Last Page

164

Copyright

© Copyright 1938 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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