The dolomites of Iowa and other sections of the country, belonging to the Niagara period of the Upper Silurian, in the course of centuries apparently undergo decomposition. The rock loses its massive structure and becomes crumbly and mealy in appearance. In the vicinity of Mount Vernon, Iowa, the top layer to a depth of 3 or 4 inches seems to be quite thoroughly disintegrated and powdery. The same phenomenon is observed in lower strata where a layer projects, by which it is especially exposed to the elements. A similar disintegration is observed in many other localities.
Proceedings of the Iowa Academy of Science
©1908 Iowa Academy of Science, Inc.
"The Decomposition of Dolomite,"
Proceedings of the Iowa Academy of Science, 15(1), 107-108.
Available at: https://scholarworks.uni.edu/pias/vol15/iss1/17