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National Geologic Map Database

Geologic Unit: Elephant Hill

Usage:

Elephant Hill Breccia [Member] of Glendora Volcanics (CA)


Geologic age:

Tertiary
Miocene, middle or older


Type section, locality, area and/or origin of name:

Not stated. Occurs in steep-walled semicircular valley head, 500 ft in diameter, that penetrates east flank of Elephant Hill near Pomona, Los Angeles Co., CA (Shelton, 1955).


AAPG geologic province:

Los Angeles basin
Transverse Ranges 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 ([ ]).