Usage:
Seven Rivers Formation of Artesia Group (NM*,TX*)
Subunits:
Azotea Tongue (NM*).
Geologic age:
Middle Permian (Guadalupian)*
Type section, locality, area and/or origin of name:
Named from exposures in bluffs south of Seven Rivers, notably bluff that lies in secs. 17 and 18 [?? 19 and 20], T. 20 S., R. 26 E., [Seven Rivers 7.5-min quadrangle], Eddy Co., southeastern NM (Meinzer and others, 1927).
Reference section (subsurface): depth-interval 1,405 to 1,970 ft, Humble Oil and Refining Company Federal Bogle No. 1 well, in sec. 30, T. 16 S., R. 30 E., Eddy Co., southeastern NM (Tait and others, 1962).
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 ([ ]).