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M332Bc South Anaconda/Bitterroot Mountains

Landscape Characteristics:

Mountains that formed in granitic rocks with some glaciation at higher elevations. Elevations range from 3800 to 8800 feet. Drainage density is moderate. Lakes occur in a few high elevation cirques.

Climate:

Mean annual precipitation ranges from 16 to 55 inches, about 60 percent falling as snow. The soil temperature and moisture regimes are cryic and typic ustic.

Potential Vegetation:

Douglas-fir forest/Western spruce-fir forest

>Relationships of Dominant Map Unit Components:

Landform Geology Soil Taxa
Mountainsides/ridges Granitic rocks/colluvium Argiborolls/Cryochrepts/Cryoboralfs/Ustochrepts
Cirquelands Granitic rocks/talus Cryochrepts
Floodplains/terraces Alluvium/outwash Cryochrepts/Cryaquents

Disturbance and Land Use:

The primary natural disturbance is fire. Land use is predominantly timber harvest, grazing, and some mining.