Sage Junction, Quealy, Cokeville, Thomas Fork, and Smiths Formations

Sage Junction Formation - Gray and tan siltstone and sandstone. Quealy Formation - Variegated mudstone and tan sandstone. Cokeville Formation - Tan sandstone, claystone, limestone, bentonite, and coal. Thomas Form Formation - Variegated mudstone and gray sandstone. Smiths Formation - Ferruginous black shale and tan to brown sandstone.
State Wyoming
Name Sage Junction, Quealy, Cokeville, Thomas Fork, and Smiths Formations
Geologic age Lower Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone
Minor
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Clastic > Mudstone > Shale > Black-shale
Incidental
Sedimentary > Clastic > Mudstone > Claystone > Bentonite
Sedimentary > Coal
References
NGMDB product
Counties Lincoln - Uinta