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Uplifted mountains that formed in sandstone and mudstone with a central core of igneous intrusive rock. Elevations range from 6000 to 11000 feet. Drainage density is moderate.
Mean annual precipitation ranges from 15 to 60 inches, about 70 percent falling as snow. The soil temperature and moisture regimes are cryic and typic ustic.
Douglas-fir forest
Landform | Geology | Soil Taxa |
---|---|---|
Structural uplands | Sandstone/mudstone/till | Cryoboralfs |
Cirquelands | Igneous rock/till | Cryochrepts |
The primary natural disturbance is fire. Land use is predominantly timber harvest and suburban development.