Usage:
Gualala Formation (CA*)
Called †Wallala Beds and †Wallala Group in early reports.
Subunits:
(alphabetical) --all in CA*: Anchor Bay Member, Stewarts Point Member.
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Notable exposures in Point Arena-Fort Ross region in Mendocino and Sonoma Cos., northwestern CA. Named from town of Gualala at mouth of Gualala River, Mendocino Co., CA (Weaver, 1941).
AAPG geologic province:
California Coast 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 ([ ]).