The effects of geologic structure on topographic form within the driftless area. The gently undulating, lower slopes are underlain by Maquoketa Shale, the steep hills in the background are of the overlying Niagaran Limestone. Graf, Iowa, late 1890s or early 1900s

Dublin Core

Title

The effects of geologic structure on topographic form within the driftless area. The gently undulating, lower slopes are underlain by Maquoketa Shale, the steep hills in the background are of the overlying Niagaran Limestone. Graf, Iowa, late 1890s or early 1900s

Subject

Geology; Hills; Croplands

United States -- Iowa -- Dubuque County -- Graf

190-

Paleozoic -- Silurian

Niagaran Limestone; Maquoketa Shale

Description

Located south from Lattner's, near Graf.

Creator

Calvin, S. (Samuel), 1840-1911

Publisher

University of Iowa. Dept. of Geoscience. Paleontology Repository

Contact Tiffany Adrain (tiffany-adrain@uiowa.edu) at The University of Iowa Paleontology Repository http://www.uiowa.edu/~geology/paleo

Date

1895/1910

2006-02-24

Rights

This digital image may be used for educational purposes, as long as it is not altered in any way. No commercial reproduction or distribution of this file is permitted without permission.

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