Usage:
Blanco Formation (KS,NM?,TX*)
Originally called Blanco Canyon Beds.
Subunits:
(alphabetical) --all in KS: Fullerton Member, Holdredge Member.
Geologic age:
late Tertiary to Quaternary (late Pliocene to early Pleistocene; Blancan to Irvingtonian NALMA)*
Due to change in Plio-Pleistocene boundary, age may now be considered all or in part Pleistocene.
Type section, locality, area and/or origin of name:
Named from Blanco Canyon in Dickens Co., and Mount Blanco Post Office in Crosby Co., panhandle of TX (US geologic names lexicons, USGS Bull. 896, 1200).
[Type locality stated to be north center SW/4 sec. 1, Blk. 3, Eastland County School Land, Crosby Co., panhandle of TX (see Boerllstorff, 1976).]
[Typical exposures: Bridwell Ranch, along Crawfish Creek, south-southwest of intersection of U.S. Highway 193 and 651, approx. Lat. 33 deg. 46 min. 00 sec. N., Long. 101 deg. 15 min. 30 sec. W., Floydada SE 7.5-min quadrangle, Blanco Canyon, Crosby Co., panhandle of TX (see Evans and Meade, 1945; Frye and Leonard, 1952).]
AAPG geologic province:
Anadarko basin
Central Kansas uplift
Permian basin*
Sedgwick 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 ([ ]).