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Mineral Resources > Online Spatial Data > Geology > by state > Kansas Geology

Geologic units in Clay county, Kansas

Dune Sand (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.2 % of this area

unconsolidated dune sand

Lithology: sand

Loess (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 16 % of this area

eolian silts

Lithology: silt

Kiowa Shale and Cheyenne Sandstone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 18 % of this area

Kiowa Shale or FM- light -gray to black illitic shale with thin coquinoidal limestone beds at the base; sandstone lenses common. Cheyenne Sandstone- massive to crossbedded, light-gray to buff fine-grained sandstone with lenses of gray sandy shale and conglomerate.

Lithology: sandstone; shale; limestone; conglomerate

Alluvium (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 17 % of this area

unconsolidated sand, silt, clay, and gravel

Lithology: gravel; sand; silt; clay or mud

Sumner Group (Phanerozoic | Paleozoic | Permian [Cimarronian]) at surface, covers 21 % of this area

Ninnescah Shale (base N)- mostly red silty shale with some gray shale , argillaceous limestone and dolomite. Wellington FM with Carlton Limestone Member (base CR)-mostly gray and some red shale with minor limestone and dolomite, siltstone, gypsum and anhydrite

Lithology: shale; limestone; siltstone; dolostone (dolomite); evaporite

Dakota Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 10 % of this area

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.

Lithology: claystone; mudstone; shale; siltstone; sandstone; coal

Chase Group (Phanerozoic | Paleozoic | Permian [Gearyan]) at surface, covers 16 % of this area

Nolans Limestone- upper and lower limestone separated by shale, 40 ft thick. Odell Shale- mostly red and green shale, 40 ft. thick. Winfield Limestone (base WF)- cherty limestone with fossiliferous gray shale, 25 ft. thick. Doyle Shale- two shale members separated limestone, 70 ft. thick. Barneston Limestone (base BA)- two thick limestone members separated by thin limestone, 90 ft. thick: with Fort Riley Limestone Member( base FR)- gray to tan massive to thin bedded limestone with minor gray shale, 45 ft thick. Matfeild Shale- two varicolored shale members separated by limestone, 80 ft. thick. Wreford Limestone- two cherty limestone members separated shale, 40 ft. thick.

Lithology: shale; limestone