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National Geologic Map Database

Geologic Unit: Van Vacter

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 (Cisuralian; 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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).