Upper Maudlow Formation

Light gray, volcanic conglomerate and breccia and olive green or dark yellowish brown volcanic sandstone, conglomeratic sandstone, siltstone and mudstone.
State Montana
Name Upper Maudlow Formation
Geologic age Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Conglomerate (Tuffaceous)
Sedimentary > Clastic > Sandstone (Tuffaceous)
Sedimentary > Clastic > Siltstone (Bed)
Minor
Sedimentary > Clastic > Mudstone (Bed)
Sedimentary > Clastic > Mixed-clastic > Conglomerate-sandstone (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