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National Geologic Map Database

Geologic Unit: Dry Creek

Usage:

Dry Creek Shale Member of Snowy Range Formation of Gallatin Group (MT*,WY*)
Dry Creek Member of Snowy Range Formation (MT)


Geologic age:

Late Cambrian*


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

Type locality: [on Dry Creek, in T. 1 N., R. 4 E.], northeast corner of Three Forks quadrangle, Gallatin Co., MT (US geologic names lexicon, USGS Bull. 896; see Peale, 1896).
Type section (emended): on north side of Yogo Gulch, on northeastern side of Little Belt Mountains, Judith Basin Co., MT. Section measured approx. 1/8 mi west of mouth of Bear Creek, in SE/4 sec. 1, T. 13 N., R. 10 E. (Deiss, 1936).
Reference section: at Three Rivers Peak, at head of Gallatin River in Gallatin Range (Ruppel, 1972).


AAPG geologic province:

Bighorn basin
Central Montana uplift
Green River basin
Montana folded belt*
Sweetgrass arch
Williston basin
Wind River basin
Yellowstone province*


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 ([ ]).