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

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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
Creator	Calvin, S. (Samuel), 1840-1911
Date Original	1895/1910
Description	Located south from Lattner's, near Graf.
Topical Subject (LCTGM)	Geology Hills Croplands
Geographic Subject	United States -- Iowa -- Dubuque County -- Graf
Chronological Subject	190-
Geologic Age	Paleozoic -- Silurian
Formation Name	Niagaran Limestone Maquoketa Shale
Type (DCMIType)	Still image
Type (AAT)	Photographs Dry collodion negatives
Type (IMT)	jpeg
Digital Collection	Calvin Geological Photographs
Contributing Institution	University of Iowa. Dept. of Geoscience. Paleontology Repository
Related Collections	This digital collection contains the geology-related images originally digitized for the Dept. of Geosciences' Calvin web exhibit: http://www.uiowa.edu/~calvin/calvin.htm . Calvin's images of Iowa City can be viewed in the Iowa City Town and Campus Scenes Digital Collection: http://digital.lib.uiowa.edu/ictcs
Rights Management	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.
Contact Information	Contact Tiffany Adrain (tiffany-adrain@uiowa.edu) at The University of Iowa Paleontology Repository http://www.uiowa.edu/~geology/paleo
Height (in.)	5
Width (in.)	7
Digitization Specifications	Photographs scanned using Epson Expression 1680 scanner at 300 ppi, 8-bit greyscale.
Date Digital	2006-02-24
Identifier	0141
Lantern Slide Number	1569

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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

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