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Glaciated fault block mountains that formed from complexly folded and faulted sedimentary and igneous rocks. Elevations range from 4000 to 10200 feet. Drainage density is moderate to high. Lakes are common in cirque basins.
Mean annual precipitation ranges from 11 to 50 inches, about 55 percent falling as snow. The soil temperature and moisture regimes are cryic and typic ustic.
Douglas-fir forest/Foothills prairie
Landform | Geology | Soil Taxa |
---|---|---|
Ridges/cirquelands | Mixed sedimentary/metasedimentary/granite | Cryochrepts/Cryorthents |
Mountainsides/benches | Mixed sedimentary/metasedimentary/volcanic | Cryoborolls/Cryoboralfs/Cryochrepts |
The primary natural disturbance is fire. Land use is predominantly timber harvest, grazing, mining, and suburban development.