Usage:
Lamarck Granodiorite of John Muir Intrusive Suite (CA*)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Cirques east of Mount Lamarck [Lat. 37 deg. 11 min. 42 sec. N., Long. 118 deg. 40 min. 13 sec. W., Mount Goddard 15-min quadrangle, Inyo Co., CA] (Bateman, 1961).
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 ([ ]).