Usage:
Ilmon Basalt (CA*)
Geologic age:
Tertiary
Miocene, early*
Type section, locality, area and/or origin of name:
Lava is traceable through series of isolated outcrops from point 2 mi west of Ilmon Station northwestward for about 3 mi to west border of map [Breckenridge Mountain quadrangle, Kern Co., CA] (Dibblee and Chesterman, 1953).
Type locality designated in lower Walker Basin Creek, at its confluence with Caliente Canyon, Breckenridge Mountain 15-min quadrangle, Kern Co., CA (Bartow and McDougall, 1984).
AAPG geologic province:
San Joaquin 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 ([ ]).