Usage:
No current usage.
(†Rooney Chert Member of Madison Limestone (MT-local) considered abandoned.)
Geologic age:
Early to Middle Mississippian (Tournaisian to Visean; Osagean)
Type section, locality, area and/or origin of name:
Type locality: on south slope of top of Lone Butte, in SE/4 sec. 23, T. 23 N., R. 13 W., [Amphitheatre Mountain 7.5-min quadrangle, 1994 ed., Flathead Co.], northwestern MT (Deiss, 1933).
[Probably named from Rooney Creek, about a mi north of Lone Butte, Amphitheatre Mountain 7.5-min quadrangle (1994 ed.), Flathead Co., northwestern MT.]
AAPG geologic province:
Montana folded belt
North Western Overthrust
Sweetgrass arch
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 ([ ]).