Usage:
Cutoff Formation (NM*,TX*)
Cutoff Shale (NM*,TX*)
Subunits:
(alphabetical) --all in TX: Butterfield, El Centro Member*, Rest Area, Shumard Member*, Williams Ranch Member*.
Geologic age:
early to middle Permian (Cisuralian to Guadalupian; Kungurian to Roadian)*
Type section, locality, area and/or origin of name:
Type exposure: on west face of Cutoff Mountain near TX-NM line (King, 1942).
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 ([ ]).