Niobrara Formation and Carlile Shale

Niobrara Formation (Kn) - Light-colored limestone and gray to yellow speckled limy shale. Carlile Shale (Kcl) - Dark-gray sandy shale; Sage Breaks Member at top; Turner Sandy Member in middle.
State Wyoming
Name Niobrara Formation and Carlile Shale
Geologic age Upper Cretaceous
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Mudstone > Shale
References
NGMDB product
Counties Crook - Niobrara - Weston