Usage:
Sunnybrook Volcanics (CA*)
Geologic age:
Jurassic*
Type section, locality, area and/or origin of name:
Named from Sunnybrook Crossing in eastern part of Newton Mine area. [Exposures of undetermined thickness occur 0.5 mi northwest[?] of Newton Mine (6 mi west of Jackson, Sutter Creek 15-min quadrangle, Amador Co., east-central CA). No type section or measured section because of paucity of outcrops.]
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 ([ ]).