Usage:
Trap Member of Bell Canyon Formation of Delaware Mountain Group (NM,TX)
Geologic age:
Middle Permian (Guadalupian)
Type section, locality, area and/or origin of name:
Type log designated but not located. Excellent exposures in the northern portion of Culberson Co., TX. Origin of name not stated by author (Nottingham, 1960).
Type section (subsurface): Gulf J.R. Grandin No. 1 well, sonic-gamma ray log, in SE/4 sec. 33, Blk. 29, PSL (public school land) survey, Loving Co., TX (Winner, 1985).
AAPG geologic province:
Permian 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 ([ ]).