Fort Union Formation - Tongue River and Lebo Members

Tongue River (Tftr) - Thick beds of yellow sandstone interbedded with gray and black shale and many coal beds. Lebo Member (Tfl) - Dark-gray clay shale and concretionary sandstone.
State Wyoming
Name Fort Union Formation - Tongue River and Lebo Members
Geologic age Paleocene
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Sandstone
Minor
Sedimentary > Coal
References
NGMDB product
Counties Campbell