•  
  •  
 

Document Type

Research

Abstract

The Sheffield formation is found in north central Iowa lying unconformably on the Owen limestone of Upper Devonian age and unconformably below the Hampton formation of Kinderhook age. The region in which the Sheffield is best exposed is in northeastern Franklin County within the area of the Iowan drift. The drift is thin enough in this area to reflect the underlying rock surface. The soft nature of the Sheffield material has allowed the streams to curve out a mature rolling topography in this portion of the county. Because of the thin Iowan drift the exposures of the Sheffield are found near the tops of the hills as well as in the beds of the streams. The drainage of this area is east into Shell Rock River.

Publication Date

1930

Journal Title

Proceedings of the Iowa Academy of Science

Volume

37

Issue

1

First Page

251

Last Page

254

Copyright

© Copyright 1930 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.