Chase Group (KS*,NE*,OK*, and CO*-subsurface)
(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*).
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).
Las Animas arch*
Forest City basin
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.
"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).