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National Geologic Map Database

Geologic Unit: Mowry

Usage:

Mowry Shale (UT*,WY*)
Mowry Shale of Mancos Group (CO*,UT*)
Mowry Shale of Colorado Group (MT*,ND*,SD*,UT,WY*)
Mowry Formation of Dakota Group (ND)
Mowry Member of Benton Shale (CO)
Mowry Member of Mancos Shale (UT*)
[?] Mowry Member of Graneros Shale (SD,WY)
[?] Mowry Member of Colorado Shale (MT,WY)


Subunits:

FORMATION STATUS (alphabetical): Albino member [informal] (MT), Bow Island Sandstone Member (MT), Clay Spur Bentonite Bed (MT*,SD*,WY*), Dynneson Sandstone Member (MT), Vaughn Member (MT*).


Geologic age:

Cretaceous*


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

Not designated. Named from Mowrie Creek, northwest of Buffalo, Johnson Co., WY (Darton, 1904). Spelling changed to Mowry in 1906
Reference section designated on north side of Rocky Creek Canyon, in SW/4 sec. 20, T. 2 S., R. 7 E., Gallatin Co., MT (Roberts, 1972).


AAPG geologic province:

Bighorn basin*
Central Montana uplift*
Chadron arch*
Denver basin*
Green River basin*
Montana folded belt*
North Park basin*
Powder River basin*
Sweetgrass arch*
Uinta uplift*
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 ([ ]).