Lime Creek Shale, containing an Upper Devonian conodont fauna, is exposed below Middle Devonian rocks at a quarry near Springville, Iowa. The occurrence is interpreted as a stratigraphic leak and is cited as further evidence of this condition occurring in a karst Devonian terrain.
Proceedings of the Iowa Academy of Science
©1967 Iowa Academy of Science, Inc.
Dorheim, Fred H.
"Stratigraphic Leak at Springville Quarry,"
Proceedings of the Iowa Academy of Science, 74(1), 142-146.
Available at: https://scholarworks.uni.edu/pias/vol74/iss1/24