Lower Maudlow Formation

Purple lava flows and gray, brown, green, and purple sandstone, conglomerate, breccia, mudstone, and tuff. Nonmarine. Thickness 1,525–1,675+ m (5,003–5,495+ ft).
State Montana
Name Lower Maudlow Formation
Geologic age Cretaceous
Lithologic constituents
Igneous > Volcanic (Flow, Volcaniclastic-volcanic breccia, Pyroclastic-tuff)purple lava flows
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Clastic > Mudstone (Bed)

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