The soils formed in residuum weathered from basalt that is overlain by wind blown deposits from sandstone and shale. The average annual precipitation is 8 to 11 inches. The frost-free period is 190 to 195 days. These are the Junction and Tobler soils. These soils all lack argillic horizons, petrocalcic horizons and rock fragments.
Vegetation is blackbrush, galleta, creosotebush, snakeweed, and Indian ricegrass.
These soils are inextensive. Washington County, Utah, 1972. This draft changes the layer from 3 to 14 inches from a C to an A horizon. Based on the material having been altered. The soil is not considered buried, and is classified from the surface.