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• Soils of the Mountain Grassland type are less than 20 inches <br />deep with more than 25 percent coarse fragments. <br />The representative profile for this unit is a member of the loamy- <br />skeletal mixed calcareous family of Lithic Cryorthents. Typically, <br />these soils have a dark grayish brown, very gravelly sandy loam <br />surface layer to 4 inches. Fractured shale bedrock occurs below <br />11 inches. <br />Phyto-Edaphic Unit 18 - Shrub-Grass Rockland/Shallow Stony Loams <br />(Indian Ricegrass in the Colony permit areas) <br />This unit occupies steep colluvial slopes that are gravelly and <br />cobbly. Bedrock is usually deeper than 40 inches, but rock out- <br />crops occupy about 30 percent of the area. The surface of these <br />soils moves annually as a result of gravitational downslope move- <br />ment, especially after a rainstorm. Many plants actually get <br />• buried or uprooted by the soil movement. <br />Soils in this unit are shallow and well-drained, having developed <br />on steep slopes composed mostly of sandstone colluvium. Typically, <br />the surface layer (to about 7 inches) is a pale brown, very grav- <br />elly, fine sandy loam. The substratum is pale brown and very <br />pale brown, very gravelly and stony, sandy loam. <br />Phyto-Edaphic Unit 16 - Desert Shrub/Swelling Clays (Greasewood <br />type in the Colony permit areas) <br />For the Greasewood communities around Grand Valley, none of the <br />phyto-edaphic units of Tiedman and Terwilliger (1978) seem appro- <br />priate, although the closest phyto-edaphic unit is PEU-16-Desert <br />Shrub/Swelling Clays. This unit is characterized by heavy, swell- <br />ing clay soils which are nonsaline and of the Dominquez series. <br />. In contrast, the soils occurring with Greasewood near Grand Valley <br />J-14 <br />