Usage:
No current usage.
(†Bernal Formation (NM*) replaced with Artesia Formation. See Artesia.)
Geologic age:
Middle Permian (Guadalupian)*
Type section, locality, area and/or origin of name:
Type sequence: near villages of Bernal and Chapelle, San Miguel Co., central northern NM (Bachman, 1953).
Type section: in SE/4 NW/4 SE/4 sec. 36, T. 14 N., R. 15 E., San Miguel Co., NM (Lucas and Hayden, 1991).
AAPG geologic province:
Estancia basin*
Las Vegas-Raton basin*
Orogrande basin*
Palo Duro 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 ([ ]).