Article

The Geology of the More Refractory Clays and Shales of Iowa

Author: S. L. Galpin

Abstract

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How to Cite: Galpin, S. L. (1925) “The Geology of the More Refractory Clays and Shales of Iowa”, Iowa Geological Survey Annual Report. 31(1). doi: https://doi.org/10.17077/2160-5270.1257