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*