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tion is dominated by aspen, with some areas of serviceberry, oakbrush, and <br />• snowberry. Capability class is YIIe. This soil commonlxhas a dark-colored <br />loam surface layer extending to 30 inches; and grayish brown, well-developed <br />loam and clay loam subsoils extending to 60 inches or more. Some lenses of <br />sandstone rock fragments occur within the subsoils. Permeability is moderate to <br />moderately slow, and available water capacity is high. The surface and subsoil <br />layers are rated as good sources of topsoil. <br />Cryoborolls - Rock Outcrop,.99. This is a steep, undifferentiated unit <br />comprised of talus slopes, dark-colored surface soils overlying sandstone and <br />shale, and rock outcrops, commonly occurring on steep, oakbrush-covered hill- <br />sides oriented east and west. The soils have not been given series names, nor <br />have typical profile descriptions been prepared because of the high variability <br />of soils, microclimates, and parent materials in these positions. <br />• Aquents and Aquolls, AW, This is a nearly level, undifferentiated soil <br />unit comprised of loamy and gravelly soils deposited by alluvial processes and <br />common]y containing free water during some part of the year above 36 inches. In <br />general, the soils of this unit that have fern-loamy textures are dark colored <br />with moderately high and high organic matter contents. Soils with high sand or <br />sand and gravel contents are commonly low in organic matter. These soils are <br />commonly considered to form alluvial valley floors, as they support stands of <br />cottonwood, alder, willows and water-loving herbaceous plants when left in <br />native vegetation; and when developed for agriculture, they are commonly used as <br />irrigated pasture or hay meadows. High variability due to the depositional pro- <br />cesses responsible for these soils precludes their separation as named soil <br />series. Capability class is Vc in most portions. <br />• <br />- 114 - (Rev. 5/86) <br />