The shallow synclinal disposition of the coal measures of southwestern Iowa is a theme of much past consideration. Of these references that of Van Tuyl is perhaps most categorical and assured in character. He definitely asserts the forming of this syncline while the coal measures were being laid down, and ascribes it to this alleged circumstance that the coal measures of the Western Interior basin and of the Eastern Interior basin are so different.
Proceedings of the Iowa Academy of Science
©1928 Iowa Academy of Science, Inc.
"Geological Date of Western Iowa Syncline,"
Proceedings of the Iowa Academy of Science, 35(1), 223-224.
Available at: https://scholarworks.uni.edu/pias/vol35/iss1/42