Usage:
Van Vacter Gypsum Member of Blaine Formation of El Reno Group (OK*)
Van Vacter Gypsum Member of Blaine Formation of Pease River Group (TX*)
Subunits:
(alphabetical): Mangum Dolomite Bed (OK), Shimer Dolomite Bed (TX).
Geologic age:
early Permian (Leonardian)*
Type section, locality, area and/or origin of name:
Type area: along west branch of Boggy Creek, in center E/2 sec. 10 and center W/2 sec. 11, T. 8 N., R. 22 W., about 2 mi northwest of Van Vacter ranch house, Beckham Co., southwestern OK (Scott and Ham, 1957).
Reference section: exposures along Cave Creek, from SW/4 sec. 28 to NE/4 sec. 32, T. 5 N., R. 24 W., Harmon Co., OK (Johnson, 1990).
AAPG geologic province:
Palo Duro basin*
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 ([ ]).