Some years since a portion of supposed fossil wood was obtained from an eighteen inch limestone layer about six or eight feet below the Geode bed. It was secure by Mr. S. J. Wallace and placed in the rooms of the Keokuk Library Association. A brief mention was made of it in a letter to the editors of the American Journal of Science and Arts, as noted in the May issue of 1878.
Proceedings of the Iowa Academy of Sciences
©1889 Iowa Academy of Science, Inc.
Gordon, C. H.
"Notes on a Fossil Wood from the Keokuk Limestone, Keokuk, Iowa,"
Proceedings of the Iowa Academy of Science, 1(Pt. 1), 97-98.
Available at: https://scholarworks.uni.edu/pias/vol1/iss1/46