Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 80 (1973) > Number 1
Document Type
Research
Keywords
Mississippian Crinoids, Iowa Crinoids, Crinoids
Abstract
Iowa Mississippian rocks, rich in fossil crinoidea, lend themselves excellently for stratigraphic zonation. Zone index fossils have been chosen in the basis of stage of evolution and abundance of occurrence. The following crinoid zones are established: North Hill formation, Aacocrinus chouteauensis (Miller), Hampton formation, Rhodocrinites kirbyi (Wachsmuth and Springer), Gilmore City formation, Rhodocrinites serpens (Laudon), Burlington formation, Dolbe Creek member, Cactocrinus proboscidialis (Hall), Haight Creek member, Agaricocrinus planoconvexus Hall, Cedar Fork member, lower part, Azygocrinus rotundus (Yandell and Shumard), upper part, Dorycrinus quinquelobus (Hall), Keokuk formation, transition beds, Eutrochocrinus trochiscus (Meek and Worthen), main limestone unit, Actinocrinites lowei (Hall), Warsaw formation, Barycrinus spurius (Hall), St. Louis formation, Dichocrinus omatus Wachsmuth and Springer and Ste. Genevieve formation, Taxocrinus huntsvillae Springer.
Publication Date
March 1973
Journal Title
Proceedings of the Iowa Academy of Science
Volume
80
Issue
1
First Page
25
Last Page
33
Copyright
©1973 Iowa Academy of Science, Inc.
Language
en
File Format
application/pdf
Recommended Citation
Laudon, L. R.
(1973)
"Stratigraphic Crinoid Zonation in Iowa Mississippian Rocks,"
Proceedings of the Iowa Academy of Science, 80(1), 25-33.
Available at:
https://scholarworks.uni.edu/pias/vol80/iss1/7