Fox Hills Sandstone

Bluish-green to green, white to dark-gray, and yellow to tan, carbonaceous and iron-stained, cross-bedded, very fine- to coarse-grained, glauconitic sandstone and siltstone. Interbedded with gray and green to brown shale and siltyshale. Thickness up to 200 ft (61 m).
State South Dakota
Name Fox Hills Sandstone
Geologic age Upper Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed, Carbonaceous, Glauconitic)Bluish-green to green, white to dark-gray, and yellow to tan, carbonaceous and iron-stained, cross-bedded, very fine- to coarse-grained, glauconitic sandstone and siltstone.
Sedimentary > Clastic > Siltstone (Bed, Carbonaceous, Glauconitic)Bluish-green to green, white to dark-gray, and yellow to tan, carbonaceous and iron-stained, cross-bedded, very fine- to coarse-grained, glauconitic sandstone and siltstone.
Minor
Sedimentary > Clastic > Mudstone > Shale (Bed)Interbedded with gray and green to brown shale and silty shale.
References

Tomhave, D.W., and Schulz, L.D., 2004, Bedrock Geologic Map Showing Configuration of the Bedrock Surface in South Dakota East of the Missouri River, South Dakota Geological Survey, GM 9, scale 1:500,000.

NGMDB product
Counties Butte - Campbell - Corson - Dewey - Haakon - Harding - Jackson - Meade - Pennington - Perkins - Walworth - Ziebach