PRE-CONFERENCE FIELD TRIP: Katian GSSP and Carbonates of the Simpson and Arbuckle Groups in Oklahoma Jesse R. Carlucci, Daniel Goldman, Carlton E. Brett, Stephen R. Westrop, and Stephen A. Leslie. Stratigraphy Volume 12, No. 3-4 Online Supplement pp. 144-202 - online 30 May 2015 12th International Symposium on the Ordovician System Field Trip Guide Files View Article