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Wide valleys, outwash plains, and terraces that formed in alluvium, glacial outwash, and lacustrine sediments. Elevations range from 1400 to 4000 feet. Drainage density is low to moderate.
Mean annual precipitation ranges from 15 to 40 inches, about 30 percent falling as snow. The soil temperature and moisture regimes are frigid and typic xeric.
Cedar-hemlock-pine forest/Western ponderosa forest
Landform | Geology | Soil Taxa |
---|---|---|
Terraces/outwash plains | Lacustrine sediments/outwash | Xerochrepts/Haploxeralfs/Haploxerolls |
Floodplains | Alluvium | Haploxerolls/Vitraquands/Haplaquolls/Fluvaquents |
The primary natural disturbances are fire and flooding. Land use is predominantly agriculture and urban/suburban development.