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Authors

Charles Keyes

Document Type

Research

Abstract

Of all of Iowa's geological formations the Dodge gypsum has held out longest and most resolutely against divulging its age. As is well known, it has been often regarded as Permian, ever since argued by Hall,1 in the middle of the last century; but there were no really direct evidences supporting his notion, and there were no fossils verifying such assumption. Nothing but analogy to other gypsum deposits could ever be adduced. Even Wilder's arguments2 were nothing more than happy analogies; and his conclusions on age and origin could just as well apply to the gypsums of eastern Europe, as to those of Kansas.

Publication Date

1938

Journal Title

Proceedings of the Iowa Academy of Science

Volume

45

Issue

1

First Page

165

Last Page

166

Copyright

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

Language

EN

File Format

application/pdf

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