Usage:
Elwell Formation (CA)
Geologic age:
Late Devonian
Type section, locality, area and/or origin of name:
Type area: Along ridge overlooking valley west of Long Lake, in SE/4 sec. 12, T. 21 N., R. 11 E., [Gold Lake 7.5-min quadrangle], Plumas Co., CA (Durrell and D'Allura, 1977).
AAPG geologic province:
Sierra Nevada 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 ([ ]).