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Both the Binco and Aaberg clays formed from clay shales occur mainly <br />in this southwest corner and along the major northwest trending <br />drainageways. The elevations of these two clay-shale derived soils <br />are generally below 7350 feet and are found at 6625 feet in the <br />northwest corner. <br />Map unit 99 soils, tentatively unclassified as to soil series, occur <br />chiefly on steep ridges in the eastern and northeastern parts of the <br />project. A narrow area of #99 soils rise steeply just west of the <br />major stream valley along the western border of the mapped area. <br />Elevations are from 6700 feet in this part to over 8000 feet in the <br />northeast corner and 7000 feet to 7400 feet in the southeastern <br />corner of the area. <br />The Skylick clay looms and looms seem to be intermediate in occur- <br />rence between the sandstone-derived Winevada-Splitro soils and the <br />tough Binco and Aaberg clays derived from shale. Outside of a few <br />tracts along the major NW trending drainageway in the southwest part • <br />of the project, these soils occur chiefly below or adjacent the <br />Winevada-Splitro soils in the eastern and northeastern garts of the <br />mapped area. <br /> <br />-26- <br />