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National Geologic Map Database

Geologic Unit: Glenn Creek

Usage:

Glenn Creek Shale Member of Jefferson Limestone (MT)


Geologic age:

Late Devonian


Type section, locality, area and/or origin of name:

Type locality: on south side of southwestern peak of White Ridge, [Slategoat Mountain 7.5-min quadrangle, Lewis and Clark Co., northwestern MT] (Deiss, 1933).
Named from Glenn Creek, [Saypo quadrangle, Lewis and Clark Co., northwestern MT], whose middle branch heads at eastern base of White Ridge. On Saypo topographic sheet [1903 ed.] the names Glenn Creek and Moose Creek have been interchanged (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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).