M332Aa Lochsa/Salmon Breaklands

Landscape Characteristics:

Highly dissected stream breaklands formed in gneiss, schist, and granitic rocks. Volcanic ash influenced loess covers some areas. Elevations range from 1400 to 7000 feet. Drainage density is high.

Climate:

Mean annual precipitation ranges from 20 to 60 inches, about 60 percent falling as snow. The soil temperature and moisture regimes are frigid and typic xeric.

Potential Vegetation:

Western ponderosa forest/Grand fir-Douglas-fir forest

Relationships of Dominant Map Unit Components:

Landform Geology Soil Taxa
Stream breaklands Loess/schist/gneiss/granite Udivitrands/Haploxerolls/Haplumbrepts
Valley floor/terraces Alluvium Xerofluvents/Udivitrands/Haploxerolls

Disturbance and Land Use:

The primary natural disturbances are fire, insects, disease, and mass wasting. Land use includes livestock grazing, mining, and timber harvest.