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Authors

S. W. Beyer

Document Type

Research

Abstract

Until very recently, geologists working in Iowa have been content to refer the various boulder clays represented in the state to two till sheets, a so called "upper" and "lower," separated in many places by the "forest beds" of McGee, or in other localities by gravels, often in conjunction with a vegetal horizon, the Aftonian of Chamberlin.

Publication Date

1896

Journal Title

Proceedings of the Iowa Academy of Sciences

Volume

4

Issue

1

First Page

58

Last Page

62

Copyright

©1896 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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