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CJ <br />Mountain Coal Compam~ <br />West Elk Mine <br />Exhibit ?7 <br />Characteristics of West Elk Mine Soil Mapping Units <br />B. L'steric Torriorthents (Regosols). <br />1. Fine. montmorillonitic. (calcareous). mesic family. <br />(Lemon Series) <br />2. Fine, montmorillonitic. (calcareous), frigid family. <br />(Elkal Series) <br />(Manias Seriesl <br />C. Ustollic Camborthids (Regosol or Brown Soil). <br />i. Fine, montmorillonitic, mesic family. <br />(Razor Seriesl <br />{Cadoma Series) <br />D. Usteric Camborthids (Regosol or Brown Soil). <br />1. Fine, montmorillonitic, mesic family. <br />(Held[ Series) <br />E. Vertic Camborthids (Regosol or Grumosol). <br />I. Fine, montmorillonitic, mesic family. <br />(Colona Series) <br />F. Borollic Camborthids (Regosol or Brown Soil). <br />1. Fine, montmorillonitic family. <br />(Bundyman Series) <br />(Kemmerer Series) <br />Extent and M jor Areas of Occurrence - Mapping unit number 5 occurs in moderate <br />acreage in the mine area. The largest acreage occurs in the southwestern part of the area <br />along, and just to the west of Minnesota Creek. Although some areas were mapped <br />within the National Forest boundary, most of the unit occurs in that part of the survey <br />obtained from the Soil Conservation Service survey of the Paonia area. <br />Characteristic Toooeraohv - Soils of this mapping unit occur on two different <br />geomorphic surfaces. Where the majority of sedimentary bedrocks are fine textured they <br />frequently occur in alluvia] fans and valley filling sideslopes below exposures of <br />sedimentary rocks. They also occur in landscapes where the soils are mostly residual or <br />only very locally transported. <br />In the former landscape they occupy gently to moderately sloping fans that are often <br />dissected by steep-walled gullies and drainage channels. In the second type of landscape <br />they occupy undulating to steeply sloping intertluvial hills and ridges separated by <br />• moderately sloping alluvial valleys. Slopes range from about tive to 40 percent with the <br />deeper soils occurring on the more gentle slopes. <br />Exhibit ?7-5 <br />