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Mountains and foothills that formed in limestone, dolomite, argillite, andesite, sandstone, and quartzite. Elevations range from 4500 to 7500 feet. Drainage density is low.
Mean annual precipitation ranges from 12 to 22 inches, about 30 percent falling as snow. The soil temperature and moisture regimes are frigid (cryic at higher elevations) and aridic ustic.
Foothills prairie/Douglas-fir forest
Landform | Geology | Soil Taxa |
---|---|---|
Mountainsides/ridges | Mixed sedimentary/metamorphic | Cryoborolls/Cryochrepts |
Foothills/Terraces | Mixed sedimentary/metamorphic | Calciorthids/Torriorthents/Argiborolls |
The primary natural disturbance is fire. Land use is predominantly livestock grazing and timber harvest.