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• outcrop consists of calcareous or noncalcareous sandstone. It forms <br />cliffs about 15 to 30 feet high and low ledges about 1 to 6 feet high. <br />Slope is 10 to 50 percent. The potential plant community is mainly pinyon <br />and juniper with an understory of Gambel's oak, mountain mahogany and <br />grasses. Land uses include non-commercial woodland and wildlife habitat. <br />N 121 Ustic Torriorthents - Sedillo complex. This unit is about 70 <br />percent Ustic Torriorthents soil and 20 percent Sedillo soil. The <br />Torriorthents soils are on middle and lower side-slopes. They are shallow <br />to deep, well drained, and formed from residuum and colluvium derived <br />mainly from thinly bedded sandstone, siltstone and shale. Slope is 15 to <br />40 percent. Typically, the surface layer is dark grayish brown, very <br />gravelly loam about 2 inches thick. The upper 25 inches of the substratum <br />is gravelly clay loam. Weathered sandstone is at a depth of 42 inches. <br />The soil is neutral to a depth of 2 inches, mildly alkaline to a depth of <br />10 inches, and moderately alkaline below that depth. Permeability is <br />• moderate to slow. Available water capacity is low or very low. Runoff <br />is rapid to very rapid and the danger of water erosion is high to very <br />high. The Sedillo soil is deep, well drained and formed in gravelly and <br />cobbly alluvium derived mainly from granite. On landslide deposits this <br />soil formed in residuum from sandstone and shale. Typically the surface <br />layer is dark brown, extremely cobbly loam about 4 inches thick. On <br />landslide deposits the surface is bouldery in many areas. The upper part <br />of the subsoil is extremely cobbly sandy clay loam about 6 inches thick. <br />The next 25 inches of the subsoil is mainly extremely stony loam. the <br />lower part and the substratum to a depth of 60+ inches is loam. The soil <br />is neutral to a depth of 10 inches, moderately alkaline to a depth of 42 <br />inches, and mildly alkaline below that depth. Permeability is moderate. <br />Available water capacity is low. Runoff is rapid to very rapid and the <br />danger of erosion is high to very high. The potential plant community is <br />mainly pinyon and juniper with an understory of mountain mahogany and <br />grasses. The primary land uses are livestock grazing and non-commercial <br />woodland. <br />• p 122 Waaes loam. This deep well drained soil of foot slopes and fan <br />terraces formed on mixed alluvium and eolian material. Typically, the <br />surface layer is brown loam about 5 inches thick. The subsoil is clay <br />2.04.9-13 <br />