Wasatch Formation

(Thrust Belt) Main body--Variegated red to gray, brown, and gray mudstone and sandstone; conglomeratic lenses. (in southwest Wyoming) - Drab to variegated claystone and siltstone, carbonaceous shale and coal, buff sandstone, arkose, and conglomerate. In northwestern part of Green River Basin is thick arkosic light-yellowish-tan sandstone intertonguing with pale-green to gray claystone and shale. (in east Wyoming) - Drab sandstone and drab to variegated claystone; numerous coal beds in lower part.
State Wyoming
Name Wasatch Formation
Geologic age Eocene
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone
Minor
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Coal
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Conglomerate (Lens)
Sedimentary > Clastic > Mudstone > Shale (Carbonaceous)
Sedimentary > Clastic > Sandstone > Arkose
References
NGMDB product
Counties Campbell - Converse - Johnson - Lincoln - Sheridan - Sublette - Uinta