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National Geologic Map Database

Geologic Unit: Gallatin

Usage:

Gallatin Group (ID*,MT*,WY*)
Gallatin Limestone (ID*,WY*)
Gallatin Formation (ID*,WY*)


Subunits:

GROUP STATUS (alphabetical): Pilgrim Limestone (MT*,WY*) or Pilgrim Dolostone (ID*,MT*), Snowy Range Formation (MT*,WY*).
FORMATION STATUS (alphabetical) --all in WY*: Du Noir Member, Open Door Member.


Geologic age:

Late Cambrian*


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

Named from typical occurrence in Gallatin Range, the southern extension of which is in northwestern corner of Yellowstone Park (Weed, 1896).


AAPG geologic province:

Bighorn basin*
Green River basin*
Montana folded belt*
Powder River 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 ([ ]).