The rock formation of Northeast Iowa belongs to the Niagaran period and is dolomitic in character. The various layers show slight differences, but, on the whole, they are typical dolomites, having the formula CaCO3, MgCO3.
Proceedings of the Iowa Academy of Science
©1914 Iowa Academy of Science, Inc.
Proceedings of the Iowa Academy of Science, 21(1), 127-128.
Available at: https://scholarworks.uni.edu/pias/vol21/iss1/20