Usage:
Harper Sandstone of Nippewalla Group (KS*)
Harper Siltstone of Nippewalla Group (KS*)
Harper Siltstone (OK)
Harper Member of Salt Fork Formation (NE)
Subunits:
FORMATION STATUS (alphabetical): Chikaskia Sandstone Member (KS,OK), Kingman Member (KS) or Kingman Sandstone Member (KS*,OK), Ninnescah Shale Member (KS), Stone Corral Member (KS).
Geologic age:
early Permian (Leonardian)*
Type section, locality, area and/or origin of name:
Named from exposures in Harper Co., central southern KS (Cragin, 1896).
AAPG geologic province:
Sedgwick basin*
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 ([ ]).