Usage:
Raton Formation (CO*,NM*)
Subunits:
Coal beds in central part of field are (ascending): lower Left Fork, upper Left Fork, Cottonwood Canyon, Ancho Canyon, York Canyon, and Chimney Divide. Coal beds in eastern part of field are (ascending): Sugarite, Brown, Green, Tin Pan, and Potato Canyon.
Geologic age:
Late Cretaceous and Paleocene*
Type section, locality, area and/or origin of name:
Type area: high mesa region btw. Trinidad, Las Animas Co., CO, and Raton, Colfax Co., NM (Lee, 1917).
Named from exposures near Raton Mesa (Hayden, 1869).
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 ([ ]).