Livingston Group: Hoppers, Billman Creek, Miner Creek, and Cokedale Formations

Pale green or gray, volcaniclastic conglomerate and conglomeratic sandstone, dark gray volcanic flows, purple flow breccia, brown and gray tuff, and maroon, green, and gray mudstone and siltstone. Fluvial and alluvial fan. Thickness about 1,000 m (3,280 ft). Note: Mapped as Livingstone Group on printed map, but unit description exists for Livingstone Formation (Klv).
State Montana
Name Livingston Group: Hoppers, Billman Creek, Miner Creek, and Cokedale Formations
Geologic age Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mixed-clastic > Conglomerate-sandstone (Tuffaceous)
Igneous > Volcanic (Flow, Volcaniclastic-volcanic breccia, Pyroclastic-tuff)
Minor
Sedimentary > Clastic > Mudstone (Bed)
Sedimentary > Clastic > Siltstone (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 Gallatin - Madison