Abstract
THE papers in this report contain descriptions of the geological characteristics of six counties in Iowa, namely, Johnson and Cerro Gordo Counties, described by Dr. Samuel Calvin, State Geologist; Marshall County, by Dr. S. W. Beyer; Polk and Guthrie Counties, by Mr. H. F. Bain; and Madison County, by Prof. J. L. Tilton and Mr. H. F. Bain. These counties are geologically important in regard to both indurated rocks and superficial deposits, and the report upon them, with the many maps and diagrams, will be found of interest and service to the people of Iowa.
Iowa Geological Survey.
Vol. vii. Annual Report, 1896, with accompanying papers. Pp. 555. (Des Moines: Iowa Geological Survey, 1897.)
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Iowa Geological Survey. Nature 58, 389 (1898). https://doi.org/10.1038/058389c0
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DOI: https://doi.org/10.1038/058389c0