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National Geologic Map Database

Geologic Unit: Cokedale

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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).