While engaged in geological work in Guthrie County a number of peculiar seed-like structures were collected from a seam of bituminous coal. They occurred in the newly opened mine of Mr. Scott, three miles northwest of Fanslers.
Proceedings of the Iowa Academy of Sciences
©1893 Iowa Academy of Science, Inc.
Jones, Arthur J.
"Cardiocarpus in Iowa,"
Proceedings of the Iowa Academy of Science, 1(Pt. 4), 61-61.
Available at: https://scholarworks.uni.edu/pias/vol1/iss4/23