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Bighorn Dolomite

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Light-gray massive siliceous dolomite in northern Yellowstone area. Gray massive cliff-forming siliceous dolomite and locally dolomitic limestone in Thrust belt and northern Wyoming.
State Wyoming
Name Bighorn Dolomite
Geologic age Middle Ordovician-Upper Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone
References

Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000.

https://pubs.er.usgs.gov/publication/70046739
NGMDB product
Counties Big Horn - Johnson - Park - Sheridan