Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > Nebraska Geology
Geologic units in Cheyenne county, Nebraska
[Additional scientific data in this geographic area]
- White River Group (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 10 % of this area
Clay, some claystone, silt and siltstone. Predominantly greenish gray and volcaniclastic. Other occurrences are greenish gray to white and bentonitic. Local channel sandstone at base. Aprox thickness 195 ft.
- Ogallala Group or Formation (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 90 % of this area
Silt, sand, sandstone, gravel and conglomerate. Predominantly interfingered fine- to coarse grained, poorly sorted, arkosic, fluvial deposits of light-gray, light-olive-gray, and grayish-green calcareous silt and sand, and locally poorly consolidated conglomerate, sandstone, and siltstone.