Usage:
Ancho Canyon coal bed (informal) of Raton Formation (NM*-local)
Ancho Canyon coal seam (informal) in Raton Formation (NM-local)
Informal. The rank or lithologic term should not be capitalized.
Geologic age:
early Tertiary (Paleocene)*
Type section, locality, area and/or origin of name:
Notable exposures in vicinity of Ancho, Salyers, Gachupin, Bracketts and Vermejo River Canyons, central part of Raton coal field, Casa Grande 15-min quadrangle, Colfax Co., northeastern NM (Pillmore, 1976).
AAPG geologic province:
Las Vegas-Raton 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 ([ ]).