Usage:
Chase Group (KS*,NE*,OK*, and CO*-subsurface)
Subunits:
(alphabetical): Barneston Limestone (KS*,NE*,OK), Blue Springs Shale (KS,NE), Cresswell Limestone (KS), Doyle Shale (KS*,NE,OK), Fort Riley Limestone (KS*,NE,OK*), Grant Shale (KS), Herington Limestone (KS*,OK*), Matfield Shale (KS*,NE*,OK*), Nolans Limestone (KS*,NE*), Odell Shale (KS*,NE*), Threemile Limestone (KS), Winfield Limestone (KS*,NE,OK*), Wreford Limestone (KS*,NE,OK*).
Geologic age:
early Permian (Wolfcampian)*
Type section, locality, area and/or origin of name:
Not designated. Covers the greater part of the western half of Chase Co. and is well exposed in bluffs along the Cottonwood River and its tributaries. Named from Chase Co., KS (Prosser, 1895).
AAPG geologic province:
Sedgwick basin*
Las Animas arch*
Nemaha anticline*
Anadarko basin*
Forest City basin
Chautauqua platform
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).