Usage:
Alpine Quartz Diorite (CA)
Geologic age:
Late Jurassic or Early Cretaceous
Type section, locality, area and/or origin of name:
Typical occurrence in general vicinity of Alpine, southern Peninsular Range, southern CA. Present in San Diego and Imperial Cos., southern CA (Miller, 1935).
AAPG geologic province:
Capistrano basin
Salton basin
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 ([ ]).