Tentative correlation of the named geologic units of Iowa.

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Bibliographic Details
Author / Creator:	Wilmarth, M. Grace (Mary Grace), 1866-1949.
Imprint:	[Washington] : U.S. Geological Survey, 1930.
Description:	2 charts ; 54 x 68 cm.
Language:	English
Subject:	Geology -- Iowa -- Charts, diagrams, etc. Stratigraphic correlation -- Iowa -- Charts, diagrams, etc. Geology. Stratigraphic correlation. Iowa. Charts, diagrams, etc. Graphs.
Format:	Map U.S. Federal Government Document Print
URL for this record:	http://pi.lib.uchicago.edu/1001/cat/bib/3873546

Hidden Bibliographic Details
Other authors / contributors:	Geological Survey (U.S.)

Description
Physical Description:	2 charts ; 54 x 68 cm.

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