In Iowa, with our nearly 500 feet of Devonian sediments, we are not apt to think very much about a possibility of the lack of this great system soon after the boundaries of our state are passed. Yet the possibility is an actuality. In west-central Missouri it has been lately found that no rocks of Devonian age are represented. The lower Carboniferous strata rests directly upon Ordovician dolomites.
Proceedings of the Iowa Academy of Sciences
©1901 Iowa Academy of Science, Inc.
Keyes, Charles R.
"A Devonian Hiatus in the Continental Interior - Its Character and Depositional Equivalents,"
Proceedings of the Iowa Academy of Science, 9(1), 105-112.
Available at: https://scholarworks.uni.edu/pias/vol9/iss1/18