Cody Shale and Frontier Formation

(North and South Wyoming) - Cody Shale (Kc2) - Dull-gray shale, gray siltstone, and fine-grained gray sandstone. Frontier Formation (Kf2) - Gray sandstone and sandy shale.
State Wyoming
Name Cody Shale and Frontier Formation
Geologic age Late Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Mudstone > Shale
References
NGMDB product
Counties Carbon