Geological map of Wisconsin, Iowa and Minnesota
Subtitle: exhibiting, also, the extension of the Iowa coal-field into Missouri, and its relation to the Illinois coal-field
By: constructed from observations by the United States Geological Corps, under instructions from the Secretary of theTreasury, by David Dale Owen ; middle, northern and northeastern Minnesota by J.G. Norwood ; the greater part of the southern shore of Lake Superior, in Wisconsin, by Chas. Whittlesey
Contributors: Norwood, J. G. (Joseph Granville), 1807-1895; Whittlesey, Charles, 1808-1886; Smith, William, approximately 1811-; Geological Survey (U.S.)
Published: 1851
Language: eng
Number of pages: 379
Subjects: Maps; Geology
Notes: "Engraved by W. Smith, Washn."

Inset: Geological map of the north shore of Lake Superior : on the scale of the original m.s. map. Scale [ca. 1:600,000].

cat-rda internet archive 20130214 reg

DigitalMapProject

Description based on print version record.

Georeferenced (world file) : WGS84 Decimal Degrees.

Scanned geologic map showing mid 19th century North Central U.S.

DPI - 600