Niobrara Formation

Light-colored limestone and gray to yellow speckled limy shale.
State Wyoming
Name Niobrara Formation
Geologic age Late Cretaceous
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Mudstone > Shale
References
NGMDB product
Counties Albany - Carbon - Converse - Laramie - Natrona - Niobrara