Usage:
Cibolo Formation (TX*)
Geologic age:
early Permian (Wolfcampian and/or Leonardian) to middle(?) Permian (Guadalupian?; Wordian?)*
Type section, locality, area and/or origin of name:
[Type locality]: on east bluff of Sierra Alta Creek [later called Cerro Alto Creek] near Cibolo Ranch and confluence of Cibolo and Sierra Alta Creeks, about 3 mi north of Shafter, [in vicinity of Lat. 29 deg. 51 min. 50 sec. N., Long. 104 deg. 19 min. 15 sec. W., Shafter 7.5-min quadrangle, 1983 ed.], Shafter district, Chinati Mountains, Presidio Co., southwestern TX (Udden, 1904; see also Sellards, 1933, Skinner, 1940 (fig. 2), Rix, 1953, Cooper and Grant, 1972).
Named from Cibolo Creek and Cibolo Ranch, Shafter district, Chinati Mountains, Presidio Co., southwestern TX (Udden, 1904).
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 ([ ]).