When the title Pennsylvanian was first proposed for the upper subdivision of the general Carbonic section of America it was with the express purpose of designating the widely known Coal Measures by a specific geographic name, and of implying a time value to the succession represented. In an unreasonable proneness of that day amounting almost to mania, of multiplying geographic and geologic terms and of giving new geographic titles to old lithologic units future contingencies of geologic taxonomy were entirely lost sight of, and the possibilities of some more refined nomenclature at no distant date were not taken into account.
Proceedings of the Iowa Academy of Science
©1922 Iowa Academy of Science, Inc.
"Taxonomic Rank of Pennsylvanian Groupings,"
Proceedings of the Iowa Academy of Science, 29(1), 105-106.
Available at: https://scholarworks.uni.edu/pias/vol29/iss1/15