- Usage in publication:
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- Corona Hornblende Granodiorite Porphyry
- Modifications:
-
- Named
- Dominant lithology:
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- Porphyry
- Granodiorite
- AAPG geologic province:
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- Los Angeles basin
Summary:
Pg. 15-16, pls. 1, 4. Dark porphyry with slightly variable texture and composition of granodiorite. Crops out in 2 belts, one on each side of Temescal Canyon, in small body southeast of El Cerrito Village, and in rectangular body in northeastern part of Corona South quadrangle. Older than Caljaco quartz monzonite [not incl. in lexicon]. Relation to Home Gardens Quartz Monzonite Porphyry (new) obscure. Name credited to Pameyan (unpub. thesis). Recognized in southern California. Age is Jurassic(?).
Source: US geologic names lexicon (USGS Bull. 1350, p. 175).
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 ([ ]).