Usage:
Cokedale Formation of Livingston Group (MT*)
Subunits:
Ardmore Bentonite Beds (MT*).
Geologic age:
Late Cretaceous (Santonian to Campanian)*
Type section, locality, area and/or origin of name:
Type section: in S/2 sec. 23 and NE/4 sec. 26, T. 2 S., R. 8 E., Park Co., MT (Roberts, 1963; 1972).
AAPG geologic province:
Central Montana uplift*
Montana folded belt*
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 ([ ]).