Usage:
Saddleback Basalt of Tropico Group (CA*)
Geologic age:
late Tertiary (early Miocene)*
Type section, locality, area and/or origin of name:
Type locality: Saddleback Mountain, 4 mi north of Boron, in S/2 sec. 9, T. 11 N., R. 7 W., Boron 15-min quadrangle, San Bernardino Co., CA (Dibblee, 1958).
AAPG geologic province:
Mojave 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 ([ ]).