The State Quarry beds of Johnson County, Iowa, comprise a very local but decidedly interesting limestone formation of Upper Devonian age. In spite of its restricted distribution the formation has been the subject of some investigation, first because of the abundant fish remains found in certain beds, and secondly because other horizons furnished large blocks suitable for building purposes.
Proceedings of the Iowa Academy of Science
©1924 Iowa Academy of Science, Inc.
Stainbrook, M. A. and Ladd, H. S.
"The Fuana of the State Quarry Beds,"
Proceedings of the Iowa Academy of Science, 31(1), 353-363.
Available at: https://scholarworks.uni.edu/pias/vol31/iss1/112