Geological map of Pre-Cambrian formations of the Gwinn iron bearing district of Michigan : based on records of drill holes by the Cleveland Cliffs Iron Company and the Oliver Iron Mining Co. and field mapping by R.C. Allen, 1913 /

Geological map of Pre-Cambrian formations of the Gwinn iron bearing district of Michigan : based on records of drill holes by the Cleveland Cliffs Iron Company and the Oliver Iron Mining Co. and field mapping by R.C. Allen, 1913 /

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Bibliographic Details
Author / Creator:	Allen, R. C. (Rolland Craten), 1881-1948.
Imprint:	[Cleveland, Ohio] : Cleveland Cliffs Iron Co., [1913?]
Description:	1 map ; 61 x 45 cm.
Language:	English
Subject:	Geology -- Michigan -- Marquette County -- Maps. Mines and mineral resources -- Michigan -- Marquette County -- Maps. Geology. Mines and mineral resources. Michigan -- Marquette County. Maps.
Cartographic data:	Scale [ca. 1:16,000].
Format:	Map Print
URL for this record:	http://pi.lib.uchicago.edu/1001/cat/bib/7715433

Hidden Bibliographic Details
Other authors / contributors:	Hamilton, O. R. Cleveland-Cliffs Iron Company. Oliver Iron Mining Company.
Notes:	Shows townships and ranges. Includes 2 inset cross sections.

Description
Item Description:	Shows townships and ranges. Includes 2 inset cross sections.
Physical Description:	Scale [ca. 1:16,000]. 1 map ; 61 x 45 cm.