Usage:
Durango Till (CO*,NM)
Geologic age:
Quaternary*
Pleistocene, middle middle*
Pleistocene, late middle*
Type section, locality, area and/or origin of name:
Named from Durango, southwestern CO (Atwood and Mather, 1915, 1924, 1932).
AAPG geologic province:
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 ([ ]).