Niobrara Chalk (KSKn;0)

State	Kansas
Name	Niobrara Chalk
Geologic age	Phanerozoic \| Mesozoic \| Cretaceous-Late
Original map label	Kn
Comments	formerly Niobrara FM. approximate thickness 600 ft. in outcrop.
Primary rock type	shale
Secondary rock type	limestone
Other rock types
Lithologic constituents	Major Sedimentary > Carbonate > Limestone (Bed) Sedimentary > Clastic > Mudstone > Shale (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	Ellis - Finney - Gove - Graham - Hamilton - Hodgeman - Jewell - Lane - Logan - Mitchell - Ness - Norton - Osborne - Phillips - Rooks - Rush - Russell - Scott - Smith - Trego - Wallace