Meeteetse Formation and Lewis Shale

Meeteetse Formation (Km) - Chalky-white to gray sandstone, yellow, green, and dark-gray bentonitic claystone, white tuff, and thin coal beds. Lewis Shale (Kle) - Gray marine shale containing many gray and brown lenticular concretion-rich sandstone beds.
State Wyoming
Name Meeteetse Formation and Lewis Shale
Geologic age Upper Cretaceous
Lithologic constituents
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Coal
Igneous > Volcanic (Pyroclastic-tuff)
Sedimentary > Clastic > Mudstone > Claystone > Bentonite
NGMDB product
Counties Fremont - Natrona