Usage:
Big Chief basalt member (informal) of Lousetown Formation (CA-recognized locally in the Truckee area)
Informal. The rank or lithologic term should not be capitalized.
Geologic age:
Quaternary (early Pleistocene)
Type section, locality, area and/or origin of name:
Mapped in vicinity of settlement of Big Chief, Placer Co., northeastern CA. [Named from Big Chief Summit, Truckee area, in sec. 15, T. 16 N., R. 16 E., Tahoe City 7.5-min quadrangle, Placer Co., northeastern CA.] (Birkeland, 1963).
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 ([ ]).