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National Geologic Map Database

Geologic Unit: Wristen

Usage:

Wristen Group (TX)
Wristen Formation (TX)


Subunits:

GROUP STATUS (alphabetical) --all in TX: Fasken Formation, Frame Formation, Wink Formation.
FORMATION STATUS (alphabetical) --all in TX: Wink Member, Frame Member.


Geologic age:

Late Silurian


Type section, locality, area and/or origin of name:

Type section (subsurface): Gulf Oil Corp. 5-SI Wristen Bros. [well], in sec. 18, Blk. 5, H and T Survey, Wickett field, Ward Co., TX (Hills and Hoenig, 1979).


AAPG geologic province:

Permian basin


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 ([ ]).