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Fault block mountains that formed in gneiss, quartzite, granite, shale, sandstone, and limestone. Alpine glaciation has modified much of the landscape. Elevations range from 5000 to 10600 feet. Drainage density is moderate to high.
Mean annual precipitation ranges from 13 to 35 inches, about 60 percent falling as snow. The soil temperature and moisture regimes are cryic and typic ustic.
Douglas-fir forest/Western spruce-fir forest/Alpine meadows and barren
Landform | Geology | Soil Taxa |
---|---|---|
Mountainsides/ridges/foothills | Till/limestone/shale/sandstone/gneiss | Cryochrepts/Cryoborolls |
Cirquelands | Limestone/gneiss/granitic materials | Cryochrepts/Cryoborolls |
The primary natural disturbance is fire. Land use is predominantly timber harvest, livestock grazing, mining, and recreation.