Geologic units in Harper county, Kansas

Nippewalla Group (Late Permian- Custerian to Cimarronian) at surface, covers 28 % of this area

Dog Creek FM- maroon silty shale, siltstone, fine-grained feldspathic sandstone. Blaine FM- (base B) gypsum beds seperated by dolomite and red shale. Flower Pot Shale -(base FL) red gypsiferous shale silty shale and minor sandstone and siltstone. Cedar Hills Sandstone- feldspathic sandstone, siltstone, and silty shale. Salt Plain FM- red flaky, silty shale and some siltstone with thick salt beds at base. Harper Sandstone with Kingman Sandstone member (base K)- red argillaceous siltstone and fine silty sandstone with a few beds of res shale and white sandstone. Stone Coral FM- dolomite, anhydrite, gypsum and salt.

Alluvium (Holocene to Pleistocene) at surface, covers 27 % of this area

unconsolidated sand, silt, clay, and gravel

Alluvium (Pleistocene) at surface, covers 19 % of this area

unconsolidated sand, silt, clay, and gravel

Loess (Holocene to Pleistocene) at surface, covers 16 % of this area

eolian silts

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

unconsolidated dune sand

Sumner Group (Late Permian - Cimarronian) at surface, covers 4 % 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