Usage:
Aguajito Shale Member of Monterey Formation (CA)
Geologic age:
Miocene
Type section, locality, area and/or origin of name:
Type section: same as Monterey Formation of Galliher (1931, Micropaleo. Bull., v. 2, no. 4), between Canyon Del Ray and San Jose Canyon along axis of Canyon Segundo, west-central CA. Named from exposures on Rancho Aguajito. Shale is almost continuously exposed over 44 sq mi and underlies at least 100 sq mi in Monterey and Salinas quadrangles (Bowen, 1965).
AAPG geologic province:
Coastal basins
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 ([ ]).