Usage:
Forbes Formation (CA)
Geologic age:
Late Cretaceous
Type section, locality, area and/or origin of name:
Type locality: on crest and east flank of Rumsey Hills [western foothill belt of Sacramento Valley, east and north of Rumsey], in T. 12 and 13 N., R. 3 W., Yolo [and Colusa Cos.], northern CA. [Origin of name not stated] (Kirby, 1943).
AAPG geologic province:
Sacramento 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 ([ ]).