The great Devonic limestone succession in Iowa was long treated as if it were a single stratigraphic unit. To it the title Cedar Valley formation was generally attached. This vaguely defined term was suggested by D. D. Owen as early as 1852. Little or no attempt was seemingly ever made to differentiate this hundred-odd feet of limestone.
Proceedings of the Iowa Academy of Science
©1913 Iowa Academy of Science, Inc.
"Late Devonic Sequence of the Iowa Region (Synopsis),"
Proceedings of the Iowa Academy of Science, 20(1), 203-206.
Available at: https://scholarworks.uni.edu/pias/vol20/iss1/20