Were it not for the fortunate circumstance that our early Carbonic section of the Mississippi Valley is already split up and its long recognized geographic title Mississippian Formation restricted in its application to a minor part more nearly coinciding with the original proposal of the name, it is probable that this familiar term would now have to give way to an older designation. In the sense of a sub-periodic title St. Louis, or Louisian, has precedence by many years over either Mississippi, or Mississippian.
Proceedings of the Iowa Academy of Science
©1919 Iowa Academy of Science, Inc.
"Stratigraphic Delimitation of St. Louis Formation,"
Proceedings of the Iowa Academy of Science, 26(1), 471-475.
Available at: https://scholarworks.uni.edu/pias/vol26/iss1/44