According to the reports of the Iowa, Illinois, and Wisconsin Geological Surveys natural crystals of barite are found rarely in the Lead and Zinc District of Iowa, Illinois, and Wisconsin. On account of the rarity of distinct crystals, considerable interest attaches to the finding of these crystals in this region at Hanover, Illinois. In the possession of Mr. T. D. Shipton of Hanover, are sixty or more well defined crystals of barite; it is to him that the writer is indebted for the material from which this paper was prepared.
Proceedings of the Iowa Academy of Science
©1915 Iowa Academy of Science, Inc.
Shipton, W. D.
"The Occurrence of Barite in the Lead and Zinc District of Iowa, Illinios and Wisconsin,"
Proceedings of the Iowa Academy of Science, 22(1), 237-239.
Available at: https://scholarworks.uni.edu/pias/vol22/iss1/30