Usage:
No current usage.
(†Bernalillo Shale (NM) is same as Madera, Bursum, and Abo Formations. See Madera, Bursum, and Abo.)
Geologic age:
Pennsylvanian to Permian
Type section, locality, area and/or origin of name:
Notable exposures in Sandia Mountains, north-central NM. Origin of name not stated by author (Keyes, 1903).
AAPG geologic province:
San Juan 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 ([ ]).