Snaky Canyon and Bluebird Mountain Formations

Snaky Canyon Formation: Medium gray limestone with yellowish brown chert, interbedded with subordinate thin sandstone beds. Marine. Thickness 245 m (804 ft). Bluebird Mountain Formation: Medium gray to brownish gray quartzite interbedded with yellowish brown, very fine-grained sandstone, gray calcareous siltstone, and medium-gray sandy limestone. Marine. Thickness 275 m (902 ft).
State Montana
Name Snaky Canyon and Bluebird Mountain Formations
Geologic age Pennsylvanian and Mississippian
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Minor
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Siltstone (Bed, Calcareous)
Incidental
Sedimentary > Chemical > Chert (Bed)
References

Vuke, S.M., Porter, K.W., Lonn, J.D., and Lopez, D.A., 2007, Geologic Map of Montana - Compact Disc: Montana Bureau of Mines and Geology: Geologic Map 62-C, 73 p., 2 sheets, scale 1:500,000. This map was digitized in 2012 as a result of a contract between the U.S. Geological Survey and the Montana Bureau of Mines and Geology.

NGMDB product
Counties Beaverhead