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Block faulted mountains that formed in shale, siltstone, sandstone, and a variety of deposited materials. The landscape has been modified by glaciation and mass wasting. Elevations range from 5800 to 10,600 feet. Drainage density is moderate to high.
Mean annual precipitation ranges from 14 to 30 inches, about 60 percent falling as snow. The soil temperature and moisture regimes are cryic and typic ustic.
Western spruce-fir forest/Alpine meadows and barren
Landform | Geology | Soil Taxa |
---|---|---|
Valley floors/terraces | Alluvium/colluvium/limestone/shale | Cryoborolls/Cryaquolls/Cryochrepts |
Mountainsides | Till/colluvium/shale/limestone | Cryoborolls/Cryoboralfs/Paleboralfs |
Alpine ridges/plateaus | Till/colluvium/shale/limestone | Cryochrepts/Cryoborolls |
The primary natural disturbances are fire and mass wasting. Land use is predominantly livestock grazing and mining.