Dilco Coal Member of Crevasse Canyon Formation (NM*)
Dilco Member of Crevasse Canyon Formation of Mesaverde Group (NM)
Late Cretaceous (Coniacian)*
Named from village of Dilco, [in sec. 22, T. 15 N., R. 19 W., McKinley Co.], northwestern NM (Sears, 1925).
Orogrande basin*
San Juan 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 ([ ]).