No current usage.
(†Hot Springs Formation of Mud Springs Group (NM-notably in Mud Springs Mountains) replaced with [†]Fra Cristobal Formation of [†]Mud Springs Group [later replaced with Red House Formation]. See Red House.)
Pennsylvanian, Middle
Derryan
Middle Pennsylvanian (Atokan)
Type locality (Whiskey Canyon section): in Whiskey Canyon [local name for tributary of Cuchillo Negro Creek about 5 mi northwest of Truth or Consequences], north end of Mud Springs Mountains, in S/2 sec. 1 and SE/4 sec. 2, T. 13 S., R. 5 W.; base of section at UTM Zone 13s, 283,719 m E., 3,675,991 m N., [Lat. 33 deg. 12 min. 04 sec. N., Long. 107 deg. 19 min. 13 sec. W.], top at UTM Zone 13s, 285,301 m E., 3,676,144 m N., [Lat. 33 deg. 12 min. 10 sec. N., Long. 107 deg. 18 min. 12 sec. W., Cuchillo 7.5-min quadrangle], Sierra Co., southwestern NM (Thompson, 1942; see also Lucas and others, 2016, New Mexico Mus. Nat. Hist. Sci. Bull., no. 69, Table 1)..
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 ([ ]).