Usage:
Big Branch Formation of Dornick Hills Group (OK)
Subunits:
Pumpkin Creek Member (OK) or Pumpkin Creek Limestone Member (OK).
Geologic age:
Middle Pennsylvanian (Moscovian; Westphalian; early Desmoinesian)
Type section, locality, area and/or origin of name:
Type locality: exposures along Big Branch of Washita River, in NW/4 sec. 11, T. 3 S., R. 2 E., Carter Co., southern OK (Harlton, 1956) .
AAPG geologic province:
South Oklahoma folded belt
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 ([ ]).