Dakota Formation

White, gray, red, brown and tan kaolinitic claystone, mudstone, shale and siltstone interbedded with grayish to yellowish brown thick lenticular sandstone beds. It also contains lignite and sandstone is commonly well cemented with iron oxide and calcite.
State Kansas
Name Dakota Formation
Geologic age Early Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Mudstone > Claystone (Bed)
Minor
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Sandstone (Lens)
Incidental
Sedimentary > Coal > Lignite (Bed)
Comments approximate thickness 200- 300 ft. in outcrop.
References

Ross, Jorgina A., 1991, Geologic Map of Kansas: Kansas Geological Survey, Univ. of Kansas, Map M-23, scale 1:500,000.

Zeller, D.E., ed., 1968, The Stratigraphic Succession in Kansas, State Geological Survey of Kansas Bull. 189.

NGMDB product
Counties Barton - Clay - Cloud - Dickinson - Ellsworth - Ford - Hamilton - Hodgeman - Kearny - Kiowa - Lincoln - McPherson - Marion - Marshall - Mitchell - Osborne - Ottawa - Pawnee - Republic - Rice - Russell - Saline - Stanton - Washington