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Authors

J. L. Tilton

Document Type

Research

Abstract

Synopsis:

First - In Warren County the drift is of uneven depth. As in other drift areas, this unevenness is not dependent entirely on the pre-glacial surface. In the unconformity of the drift on this pre-glacial surface a relation is seen indicating a similarity between the present drainage system and the pre-glacial drainage system. Second - The present river valleys and larger ravines are larger than present streams require. They fit into the pre-glacial valleys. Third - ln the smaller ravines only do we find erosion without regard to the pre-glacial configuration of the county.

Publication Date

1893

Journal Title

Proceedings of the Iowa Academy of Sciences

Volume

1

Issue

Pt. 4

First Page

31

Last Page

33

Copyright

©1893 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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