331Fe Missouri Breaks

Landscape Characteristics:

Hilly plains, river breaks, terraces, and floodplains that formed in alluvium, sedimentary rocks, and some glacial till. Elevations range from 1700 to 2000 feet. Drainage density is high.

Climate:

Mean annual precipitation ranges from 10 to 14 inches, about 20 percent falling as snow. The soil temperature and moisture regimes are frigid and typic ustic.

Potential Vegetation:

Wheatgrass-needlegrass and Northern floodplain forest.

Relationships of Dominant Map Unit Components:

Landform Geology Soil Taxa
Plains Sedimentary Ustochrepts/Ustorthents/Haploborolls
Breaks/terraces Alluvium/till Ustochrepts/Argiborolls/Ustorthents
Floodplains Alluvium Ustifluvents

Disturbance and Land Use:

The primary natural disturbance is erosion. Land use is predominantly grazing and recreation.