APPCOR13333 - Laserfiche WebLink

Home Browse Search

,.- • Page 2 The Mount Garfield Formation is the lowest member of the Mesa Verde Group and consists of buff and gray fine-grained and medium-grained sandstones and gray shales. The regional dip is approximately 2° to the northeast into the basin. The most consistenC coal within the lease is the Cameo seam. The bed ranges in thickness from 17 to 22 feet. In section 15, lU, and 3 the Cameo seam appears to split into an upper and lower bench. Present throughout most of the bed is lenses of bone coal and carbonaceous shale. The existing mining operation unit is bound by two high angle normal faults. These faults appear to diverge to the northeast. The vertical throw on the east fault is approximatley 70 feet. 1'he west fault lies west of Che McClane portal and has not intersected the hlcClane Canyon mine workings. Based upon limited knowledge from test entries and drill holes, the roof rock consists of gray and black shales of varying hardness and competence. The floor rock consits of shales in some places and a medium-grained friable sandstone elsewhere. No floor heaving has yet been observed within the 1•IcClane Canyon mine. Overburden thicknesses range from U - 1,400 fee[ on the subject lease. Figure 2.1-11 (of the Mine Plan) is an isopach map of overburden to the Cameo seam. Most of the overburden on the lease area ranges from 100 fee[ (in the central portion of lease area) to 1,000 feet (in the northeast portion of lease area). According Co Sheridan Enterprises, Inc. no other valuable mineral resources have been identified in this area. There appears to be no conflict with oil and gas interests. All of Sections 10 and 15 were withdrawn from the simultaneous oil and gas list on March, 1977 by the Colorado S[a[e Director of the Bureiu of Land Management. .In the Douglas Pasa area there have been small coal mining operations going on. These are, however, no records or information regarding previous mining operations in the a:ea. P