Usage:
Nacimiento Formation (CO*,NM*)
Subunits:
(alphabetical) --all in NM: Arroyo Chijuillita Member, Escavada Member, Ojo Encino Member.
Geologic age:
Tertiary*
Paleocene*
Type section, locality, area and/or origin of name:
Town of Nacimiento at the foot of Nacimiento Mountains, Sandoval Co., NM (Gardner, 1910).
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 ([ ]).