The finding of natural gas in the Pleistocene deposits of the state has been noted from time to time during the past decade. The first mention of its occurrence, as far as known, appeared in the report of the state mine inspector for the years 1886 and 1887.
Proceedings of the Iowa Academy of Sciences
©1896 Iowa Academy of Science, Inc.
Leonard, A. G.
"Natural Gas in the Drift of Iowa,"
Proceedings of the Iowa Academy of Science, 4(1), 41-47.
Available at: https://scholarworks.uni.edu/pias/vol4/iss1/8