Usage:
No current usage.
(Rocks of †Nannie Basin Limestone (MT) reallocated to Damnation Limestone. See Damnation.)
Geologic age:
Middle Cambrian
Type section, locality, area and/or origin of name:
Type locality: where it forms the lower cliffs which are the rim of physiographic feature known as Nannie Basin, [Una Mountain 7.5-min quadrangle, Powell Co., northwestern MT] (Deiss, 1933).
AAPG geologic province:
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 ([ ]).