Mineral inclusions found in geodes from the Warsaw formation of southeastern Iowa are described. The following are reported as present: quartz, chalcedony, calcite, dolomite, ankerite, barite, aragonite, smithsonite, iron pyrite, marcasite, chalcopyrite, sphalerite, sulfur, goethite, hematite, pyrolusite, kaolinite, malachite, selenite, and limonite. Tenorite and chalcocite have been tentatively identified.
Proceedings of the Iowa Academy of Science
©1959 Iowa Academy of Science, Inc.
Tripp, Richard B.
"The Mineralogy of Warsaw Formation Geodes,"
Proceedings of the Iowa Academy of Science, 66(1), 350-356.
Available at: https://scholarworks.uni.edu/pias/vol66/iss1/47