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Plains and hills formed in residuum and alluvium from shale and sandstone. Some lacustrine sediments also occur. Elevations range from 2100 to 4150 feet. Drainage density is moderate.
Mean annual precipitation ranges from 10 to 14 inches, about 30 percent falling as snow. The soil temperature and moisture regimes are frigid and aridic ustic. Summers are dry.
Grama-needlegrass-wheatgrass with Eastern ponderosa forest on higher elevation hills.
Landform | Geology | Soil Taxa |
---|---|---|
Plains/hills | Sedimentary | Camborthids/Haplargids/Haploborolls/Ustochrepts |
The primary natural disturbance is fire and drought. Land use is predominantly livestock grazing with a small amount of dryland farming.