Report of a Geological Survey of Wisconsin, Iowa, and Minnesota: And Incidentally of a Portion of Nebraska Territory. Made Under Instructions From the United States Treasury Department, Part 2 (Hardco

Published in 1852, this geological survey covers the upper Mississippi River valley, including parts of Wisconsin, Iowa, Minnesota, and Nebraska. Filled with detailed lithographic illustrations and maps, this volume provides valuable historical insight into the geological characteristics of the region.

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