Usage:
Ardath Shale of La Jolla Group (CA*)
Geologic age:
Tertiary
Eocene, middle*
Type section, locality, area and/or origin of name:
Type section: on the east side of Rose Canyon, 800 m south of Ardath Road intersection with Interstate Route 5, La Jolla quadrangle, San Diego Co., CA. (Kennedy and Moore, 1971).
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 ([ ]).