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C • Exhibit "C" <br />Description of Land to be Affected <br />Geolo v <br />A brief statement of general geology taken from the Seneca II report <br />indicates that the surface exposures are chiefly upper Cretaceous <br />sedimentary rocks of the Mesa Verde group overlain by Lewis shale. Other <br />formations such as Lance, Fort Union, and kasatch overlie these lower <br />beds. Sandstones are dominant but certain shale beds give rise to tough <br />clay soils such as the Aabero and Einco series which have a very high <br />content of clay. <br />Vegetation <br />At elevations of around 6000-8000 feet, the following general types occur <br />in the drilling area: Aspen, Mountain Brush, and Sagebrush-grass. <br />Briefly, these types may be described as: <br />Sa ebrush-grass - Types occurring on lower slopes and ridges dominated by <br />low shrubs and big sagebrush (Artemesia tridentata); other species include <br />snowberry (Symphorocarpos sp) and fortis such as arrowleaf balsamroot <br />(Balsamorhiza sagittata), lupines (Lupinus sp), clover (Trifolium), spring <br />parsely, and prairie onion (Allium textile). Grasses make up a small <br />percent of the total herbage. <br />Mountain Brush - This is a major group on sandier soils, north and east <br />slopes, and high ridges. Species include gambell oak (Ouercus gambelli), <br />chokecherry (Prunus virginiana), Saskatoon serviceberry (Amelanchier <br />alnifolia). Forbs include starwort (Stellaria crassifolia), western <br />yellow (Achillea . lanulosa), larkspur (Delphinium sp), and Fendler <br />meadowrue (Thalictrum fendleri). Some grasses and sedges occur also, <br />Aspen types - Occur on higher northfacing slopes or in pockets where snow <br />collects, seeps provide additional moisture on protected perennial stream <br />drainages at lower elevations. Forbs occur such as angelica (Angelica <br />sp), false hellebore (Veratrum californicum}, Columbine (Aquilegia sp), <br />and delphinium. Grasses such as mountain brome may occur in patches, <br />1, <br /> <br />