Usage:
Chimney Divide coal bed (informal) of Raton Formation (NM*)
Informal. The rank or lithologic term should not be capitalized.
Geologic age:
Tertiary*
Paleocene*
Type section, locality, area and/or origin of name:
Not designated. Crops out below crests of long, fingerlike ridges and underlies high drainage divides throughout an area of more than 50 sq mi across north-central portion of Casa Grande quadrangle, Colfax Co., 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 ([ ]).