There may be some justification for name "Red Rock Canyon beds, formation or group" for stratigraphic sequence containing Ricardo fauna, but G.K. Gilbert (Geog. and Geol. Expl. W 100th Mer., p.142-143, 1875) and H.W. Fairbanks (Amer. Geol. v.176 p.68-69, 1896) did not use name for nomenclature purposes. Following discovery that fauna from beds at Red Rock Canyon [at Ricardo, eastern part of Kern Co, CA] is sharply distinct from that in Barstow section as representing "Ricardo fauna", "Ricardo beds" or "Ricardo Pliocene", author therefore prefers name "Ricardo formation" or "Ricardo group".
Source: GNU records (USGS DDS-6; Menlo GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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