Green River Formation - Wilkins Peak Member

Green, brown, and gray tuffaceous sandstone, shale, and marlstone; contains evaporites in subsurface sections.
State Wyoming
Name Green River Formation - Wilkins Peak Member
Geologic age Eocene
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Carbonate > Marlstone
Sedimentary > Clastic > Sandstone
Incidental
Sedimentary > Chemical > Evaporite
Igneous > Volcanic (Pyroclastic-tuff)
References
NGMDB product
Counties Lincoln - Sublette - Sweetwater - Uinta