Usage:
Butano Sandstone (CA*)
Geologic age:
early Tertiary (Eocene)*
Type section, locality, area and/or origin of name:
Type section [Principal reference section]: upper 1,700 ft exposed along Little Boulder Creek [in SW/4 sec. 22, SE/4 sec. 21, and N/2 sec. 28, T. 8 S., R. 3 W., near northern bdry. Big Basin Redwoods State Park], Big Basin 7.5-min quadrangle, San Mateo and Santa Cruz Cos., CA (Cummings and others, 1962).
Named from exposures on Butano Ridge, Santa Cruz Mountains, Santa Cruz quadrangle (scale 1:125,000), San Mateo Co., southern CA (Branner and others, 1909).
AAPG geologic province:
Santa Cruz basin*
California Coast 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 ([ ]).