I handed in the subject of this paper, intending to throw together various notes which have been accumulating for several years. I recently took a trip to the region under consideration intending to visit several localities and examine the borings of several wells, which, however, I was prevented from doing for lack of time. Had I been able to procure careful notes from all the wells I should be more decided on several points stated below.
Proceedings of the Iowa Academy of Sciences
©1890 Iowa Academy of Science, Inc.
Todd, J. E.
"Notes on the Geology of Northwestern Iowa,"
Proceedings of the Iowa Academy of Science, 1(Pt. 2), 13-16.
Available at: https://scholarworks.uni.edu/pias/vol1/iss2/5