Usage:
Barnsdall Formation of Ochelata Group (OK*)
Subunits:
(alphabetical) --all in OK*: Birch Creek Limestone Member, Okesa Sandstone Member.
Geologic age:
Late Pennsylvanian (Missourian)*
Type section, locality, area and/or origin of name:
Type locality: area between Barnsdall and Wolco, in T. 24 N., R. 11 E., Osage Co., north-central OK. Name is from town of Barnsdall, formerly Bigheart. This is same town from which Bigheart sandstone was named (White and others, 1922). Type locality of Bigheart is in hills west of the town, and name of town has been changed to Barnsdall. Town now called Bigheart is in sec. 3, T. 27 N., R. 10 E., Osage Co., and is on the outcrop of neither Barnsdall formation or Bigheart sandstone (Oakes, 1951).
AAPG geologic province:
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 ([ ]).