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National Geologic Map Database

Geologic Unit: Rustler

Usage:

Rustler Formation (NM*,TX*)
Rustler Limestone (NM*,TX*)
Rustler Formation of [†]Ochoa Group (NM,TX)
(†Ochoa has been used as a provincial chronostratigraphic term (Ochoan Series) for some time. To prevent confusion, the use of Ochoa as a lithostratigraphic term should be avoided. Not used by the USGS.)


Subunits:

(alphabetical): Culebra Dolomite Member (NM*,TX?), Forty-niner Member (NM*,TX?), Magenta Dolomite Member (NM*) or Magenta Member (TX?), Tamarisk Member (NM*,TX?), Virginia Draw Member (NM,TX).


Geologic age:

Permian, Late*
Ochoan*


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

Named from exposures in Rustler Hills, [Lat. 31 deg. 40 min. 39 sec. N., Long. 104 deg. 10 min. 54 sec. W., Rustler Hills 7.5-min quadrangle], Culberson Co., TX (Richardson, 1904).


AAPG geologic province:

Permian basin*
Orogrande basin*


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 ([ ]).