Geologic units in Finney county, Kansas

Additional scientific data in this geographic area

Loess (Holocene to Pleistocene) at surface, covers 65 % of this area

eolian silts

Dune Sand (Holocene to Pleistocene) at surface, covers 22 % of this area

unconsolidated dune sand

Alluvium (Holocene to Pleistocene) at surface, covers 6 % of this area

unconsolidated sand, silt, clay, and gravel

Alluvium (Pleistocene) at surface, covers 3 % of this area

unconsolidated sand, silt, clay, and gravel

Niobrara Chalk (Late Cretaceous) at surface, covers 3 % of this area

Interbedded, soft, light-gray calcareous shale and chalk

Carlile Shale (Late Cretaceous) at surface, covers 2 % of this area

Chalky shale with bentonite and thick chalk beds, dark gray fissile shale containing septarian concretions, and fine-grained sandstone.

Ogallala Formation (Miocene) at surface, covers 0.2 % of this area

massive to cross-bedded, generally arkosic sand, silt and gravel, locally cemented with calcium carbonate; also contains limestone, volcanic ash, diatomaceous marl, opaline sandstone and bentonitic clay