Usage:
Penistaja Bed of Ojo Encino Member of Nacimiento Formation (NM)
Geologic age:
Tertiary
Paleocene, early
Type section, locality, area and/or origin of name:
Type section: west flank Torreon Wash where extensively exposed; type is offset from NE/4 NW/4 NW/4 sec. 27 to SE/4 SE/4 SW/4 sec. 28, T. 21 N., R. 5 W., Deer Mesa 7.5-min quadrangle, Sandoval Co., northwestern NM. Named from nearby spring in sec. 14, T. 20 N., R. 4 W. (Williamson and Lucas, 1992).
AAPG geologic province:
San Juan 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 ([ ]).