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- - -„ <br /> <br />Revision <br />February 1982 <br />The permit area is on the south-facing valley slopes with elevation <br />ranging from 6,140 feet to over. 8,200 feet (Exhibit 2.04.3-B). The land- <br />forms are typical for the valley setting. <br />Nine ephemeral creeks and gulches drain the permit area into the North <br />i <br />Fork of the Gunnison River (Exhibits 2.04.5-A and 2.04.5-B), All of the <br />watersheds are quite steep with high relief for such small watershed areas. <br />Defined channels have not been extensively developed due to the resistance <br />of the Mesaverde sandstones. Ten to twenty foot drops over sandstone <br />ledges are common. Dunrud (1976) noted that the drainages follow fracture <br />systems in the underlining rock. These weaker areas, due to the <br />fracturing, allow more drainage incisions in comparison to erosion of <br />undisturbed strata. <br />2.04.6 Geology Description for Underground Mine <br />Geologic and Geohydrologic including cross-sections, logs of drill <br />holes, coal crop lines, coal strikes and dips, test boring, and core sample <br />results are included in Appendix XIII, and Exhibits 2.04.6-A through <br />2.04.6-P, Exhibit 2.04.5-B, and Exhibit 2.04,5-C. Additional physical ana- <br />lysis of strata, above and below on the E Seam are included in Appendix <br />XVI,8. <br />Stratigraphy <br />Western Slope Carbon's Hawk's Nest Mine lies at the eastern end of the <br />Somerset District, a part of the Paonia Coal Field described by Johnson <br />(1948). The nomenclature follows that of Johnson, except as noted. <br /> <br />The main coal beds within the permit area are found in the Upper <br />Cretaceous Mesaverde Formation, which is overlain by the early Teritiary <br />2.04-12 <br />,~. ~~ <br />