Usage:
Steele Shale (MT*,WY*)
Steele Member of Cody Shale (WY*)
Subunits:
FORMATION STATUS (alphabetical): Ardmore Bentonite Bed (MT*,WY*), Cow Creek Sandstone Member (WY*), Shannon Sandstone Member (MT*,WY*), Sussex Sandstone Member (MT*,WY*).
MEMBER STATUS (alphabetical): Shannon Sandstone Bed (WY*), Sussex Sandstone Bed (WY*).
Geologic age:
Late Cretaceous (Campanian)*
Type section, locality, area and/or origin of name:
Type locality: Fort Steele, on the North Platte River, Carbon Co., WY.
AAPG geologic province:
Green River basin
Powder 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 ([ ]).