Usage:
Rosario Group (CA*)
Rosario Formation (CA)
Subunits:
GROUP STATUS (alphabetical) --all in CA*: Cabrillo Formation, Lusardi Formation, Point Loma Formation.
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Type section: exposures south of Rio del Rosario near town of El Rosario, west coast of Baja California, 300 km south of international boundary (Beal, 1924).
AAPG geologic province:
Peninsular Ranges province*
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 ([ ]).