Stratigraphy of Middle Ordovician rocks in the zinc-lead district of Wisconsin, Illinois, and Iowa /

Bibliographic Details
Main Author:	Agnew, Allen F., 1918-2012 (Author)
Corporate Author:	Wisconsin Geological and Natural History Survey
Format:	Government Document eBook
Language:	English
Published:	Washington : United States Department of the Interior, Geological Survey, 1956.
Series:	Geological Survey professional paper ; 274-K. Shorter contributions to general geology.
Subjects:	Geology > Illinois. Geology > Iowa. Geology > Wisconsin. Geology, Stratigraphic > Ordovician. Zinc ores. Geology. Geology, Stratigraphic. Ordovician Geologic Period. Illinois. Iowa. Wisconsin. From 425 to 500 million years ago
Online Access:	https://purl.fdlp.gov/GPO/gpo86135

by Agnew, Allen F., 1918-2012
Published 1956

Government Document Book