Usage:
McAlester Formation of Krebs Group (OK*)
McAlester Shale of Krebs Group (KS*,OK*)
McAlester Formation (AR*)
Subunits:
(alphabetical): Booch Sand Member (OK), Cameron Sandstone Member (OK*), Keota Sandstone Member (OK*), Lequire Sandstone Member (OK*), McCurtain Shale Member (OK*), Tamaha Sandstone Member (OK*), Warner Sandstone Member (KS*,OK*). [Also incl. the McAlester, or Stigler coal bed, and the Upper Hartshorne coal, which occurs near the base of the formation.]
Geologic age:
Middle Pennsylvanian (Desmoinesian)*
Type section, locality, area and/or origin of name:
Named from exposures around McAlester, Pittsburg Co., eastern OK (Taff, 1899).
AAPG geologic province:
Arkoma 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 ([ ]).