•  
  •  

Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 30 (1923) > Annual Issue

 

Document Type

Research

Abstract

There are at least two pre-glacial valleys in Lee County, which is situated in the extreme southeast corner of the state of Iowa, the first running nearly parallel to the present course of the Mississippi, and the other roughly parallel with the valley of the Des Moines. These valleys were once occupied by great mid-continental streams, whose geological age has never been fully determined. Their waters eroded channels several miles in width through the indurated rocks of the Carboniferous, over which they passed, to a depth considerably below the present grade of the water courses with which they are analogous.

Publication Date

1923

Journal Title

Proceedings of the Iowa Academy of Science

Volume

30

Issue

1

First Page

425

Last Page

431

Copyright

©1923 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Download

Comments?

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.