Blind Bull Formation

Gray to tan conglomeratic sandstone, siltstone, claystone, coal, and bentonite.
State Wyoming
Name Blind Bull Formation
Geologic age Upper Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Sandstone
Incidental
Sedimentary > Coal
Sedimentary > Clastic > Mudstone > Claystone > Bentonite
References
NGMDB product
Counties Lincoln - Sublette