Usage:
Hex Claystone (CA*)
Geologic age:
Early Cretaceous*
Type section, locality, area and/or origin of name:
Hex Hill, just south of Devils Den, northwestern Kern Co., southern CA. Crops out east of Orchard Peak as single band about 0.5 mi wide and more than 4 mi long, paralleling base of scarp formed by Avenal Ridge. Occupies core of Avenal Ridge piercement anticline (Marsh, 1956 [abs.], 1960).
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 ([ ]).