Usage:
Arroyo Hondo Shale Member of Lodo Formation (CA*)
Geologic age:
early Tertiary (Eocene)*
Type section, locality, area and/or origin of name:
Type locality: on Arroyo Hondo Creek, in S/2 sec. 14, T. 17 S., R. 13 E., [Cierva Mountain 7.5-min quadrangle, Fresno Co.], central CA (White, 1940).
AAPG geologic province:
San Joaquin 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 ([ ]).