Usage:
Poison Canyon Formation (CO*)
Geologic age:
Late Cretaceous and Paleocene*
Type section, locality, area and/or origin of name:
Not designated. Origin of name not stated by author, but probably named from exposures in Poison Canyon and across Muddy Creek to Promontory Bluffs, Huerfano Co., CO (Hills, 1888).
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 ([ ]).