Usage:
Tupman Shale Member of Etchegoin Formation (CA*)
Geologic age:
Miocene, late*
Tertiary
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 3,387 to 4,717 ft, Unit Operation Naval Petroleum Reserve No.1 (NPR-1) well 324-19R, west part of Elk Hills oil field, Elk Hills, in NW/4 sec. 19, T. 30 S., R. 23 E., San Joaquin Valley, Kern Co., CA. Named from community of Tupman, at east end of Elk Hills, Kern Co., CA (Berryman, 1973).
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 ([ ]).