Pg. 5-12, 24, Appendix. Oscar Group. Preferred name of the Oklahoma Geol. Survey rather than Kansas names Council Grove and Chase. Described from Noble County, central northern Oklahoma. Includes (descending) Herington Limestone, Enterprise Shale, Winfield Limestone, Doyle Shale, Fort Riley Limestone, Matfield Shale, Wreford Limestone, Garrison Shale, and, in subsurface, Witney (Hodges) sand, Cottonwood Limestone, Hotson sand, and Neva Limestone. Total thickness about 650 feet; outcrop thickness about 300 feet. Overlies Vanoss Group (in subsurface); underlies Sumner Group. Age is latest Pennsylvanian (Gearyan), based on fossil data (see Branson, 1962; Wilson and Rashid [abs.], 1971; Clendening [abs.], 1971); previously considered earliest Permian.

Source: Publication.