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Dissected foothills, plains, fans, and terraces that formed in alluvium and calcareous materials from shale and siltstone. Elevations range from 3500 to 5500 feet. Drainage density is moderate.
Mean annual precipitation ranges from 15 to 19 inches, about 50 percent falling as snow. The soil temperature and moisture regimes are frigid and typic ustic. Chinook winds are very common.
Foothills prairie
Landform | Geology | Soil Taxa |
---|---|---|
Foothills | Shale/siltstone | Haploborolls/Paleboralfs/Torriorthents |
Plains/terraces/fans | Calcareous sediments/alluvium | Calciborolls/Haploborolls |
The primary natural disturbance is fire and wind. Land use is mostly livestock grazing with some cropland.