Bear River Formation

Black shale, fine-grained brown sandstone, thin limestone, and bentonite beds.
State Wyoming
Name Bear River Formation
Geologic age Lower Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone > Shale > Black-shale
Minor
Sedimentary > Carbonate > Limestone
Incidental
Sedimentary > Clastic > Mudstone > Claystone > Bentonite
References
NGMDB product
Counties Lincoln - Sublette - Teton - Uinta