Dakota Formation (KSKd;0)

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	Phanerozoic \| Mesozoic \| Cretaceous-Early
Original map label	Kd
Comments	approximate thickness 200- 300 ft. in outcrop.
Primary rock type	claystone
Secondary rock type	mudstone
Other rock types	shale; siltstone; sandstone; coal
Lithologic constituents	Major Sedimentary > Clastic > Mudstone (Bed) Sedimentary > Clastic > Mudstone > Claystone (Bed) Sedimentary > Clastic > Sandstone (Lense) Sedimentary > Clastic > Siltstone (Bed) Sedimentary > Clastic > Mudstone > Shale (Bed) Incidental Sedimentary > Coal > Lignite (Bed)
Map references	Ross, J. A., 1991, Geologic Map of Kansas: Kansas Geological Survey, Univ. of Kansas Map M-23 Scale 1:500K.
Unit references	Ross, J. A., 1991, Geologic Map of Kansas: Kansas Geological Survey, Univ. of Kansas Map M-23 Scale 1:500K. Zeller, D.E., ed., 1968, The Stratigraphic Succession in Kansas, State Geological Survey of Kansas Bull. 189.
Geographic coverage	Barton - Clay - Cloud - Dickinson - Ellsworth - Ford - Hamilton - Hodgeman - Kearny - Kiowa - Lincoln - McPherson - Marion - Marshall - Mitchell - Osborne - Ottawa - Pawnee - Republic - Rice - Russell - Saline - Stanton - Washington