Usage:
Cody Shale (ID?,MT*,WY*)
Cody Formation (WY*)
Subunits:
(alphabetical): Ardmore Bentonite Beds (WY*), Belle Fourche Member (MT*,WY*), Carlile Member (MT*,WY*), Claggett Member (MT*,WY*), Eldridge Creek Member (MT*), /Gammon Ferruginous Member (MT*,WY*), /Greenhorn Calcareous Member (MT*), Niobrara Member (MT*,WY*), Sage Breaks Member (WY*), Shannon Sandstone Member (MT,WY*), Steele Member (WY*), Sussex Sandstone Member (WY*), Telegraph Creek Member (MT*,WY), Wallace Creek Tongue (WY*).
Geologic age:
Late Cretaceous (Cenomanian to Campanian)*
Type section, locality, area and/or origin of name:
Type locality: exposures at town of Cody near Shoshone River, Park Co., WY [Lat. 44 deg. 31 min. 35 sec. N., Long 109 deg. 03 min. 24 sec. W., Cody 7.5-min quadrangle] (Lupton, 1916).
AAPG geologic province:
Montana folded belt*
Central Montana uplift*
Bighorn basin*
Powder River basin*
Wind River 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 ([ ]).