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Stream breaks and steep mountain slopes formed in basalt. Erosion and mass wasting are the dominant geomorphic processes. Elevations range from 900 to 3000 feet. Drainage density is high.
Mean annual precipitation ranges from 15 to 25 inches, with only a minor amount falling as snow. The soil temperature and moisture regimes are frigid and typic xeric.
Wheatgrass-bluegrass with Western ponderosa forest on low terraces or north aspects.
Landform | Geology | Soil Taxa |
---|---|---|
Breaks | Basalt | Argixerolls |
Canyon floors | Alluvium/loess | Argixerolls/Haploxerolls/Xerofluvents |
The primary natural disturbance is fire and mass wasting. Land use is predominantly livestock grazing.