•  
  •  
 

Document Type

Research

Abstract

The Maquoketa shale is the upper division of the Ordovician of the upper Mississippi Valley. It lies conformably on the subjacent Galena dolomite and is apparently unconformable with the overlying massive dolomitic beds of the Niagaran. In thickness, the formation varies from 160 to 200 feet or more. In common with the other Paleozoic beds of Iowa, it dips gently to the southwest and outcrops in a belt eight to ten miles wide in the northeastern part of the state; this belt is typically developed in Dubuque County and extends to the northwest into adjacent counties and to the southeast into Jackson County and across Mississippi River into Illinois.

Publication Date

1914

Journal Title

Proceedings of the Iowa Academy of Science

Volume

21

Issue

1

First Page

225

Last Page

229

Copyright

©1914 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.