Usage:
Ricardo Formation (CA*)
Ricardo Group (CA)
(†Ricardo Group not used by the USGS.)
Subunits:
GROUP STATUS (alphabetical) --all in CA [group rank and formations not adopted by USGS]: Cudahy Camp Formation, Dove Spring Formation.
FORMATION STATUS: Kramer Lake Beds (CA).
Geologic age:
Tertiary
Miocene*
Type section, locality, area and/or origin of name:
Type section: between Redrock and Last Chance Canyons, El Paso Mountains [Saltdale 15-min quadrangle] Kern Co., CA (Merriam, 1914; Dibblee, 1967).
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 ([ ]).