Laserfiche WebLink
USFS Road 711, historically known as Hammond Trail, follows the course of the Dry Fork <br />before crossing Deep Creek and ascending the west flank of Coal Creek Mesa. <br />The elevation of the proposed Lions Mesa exploration area ranges from 7200 ft. in the drainage <br />of East Fork of Minnesota Creek and increases southeastward to 8500 ft. on Lions Mesa. The <br />terrain is comprised of slopes and benches within the Wasatch and Mesa Verde Formations. Lick <br />Creek and South Prong Creek form the most conspicuous features within the proposed <br />exploration azea. Lick Creek is an intermittent drainage and South Prong Creek is a perennial <br />stream with both draining westwazd into East Fork. East Fork of Minnesota Creek drains west <br />and south into Minnesota Creek. Minnesota Creek in turn joins the North Fork of the Gunnison <br />River at the town of Paonia. <br />Geology <br />Both the proposed Dry Fork and Lions Mesa exploration application areas lie along the <br />southeastern edge of the Piceance Basin within the Somerset Coal Field, occurring on the <br />Minnesota Pass U.S.G.S. 7 1/2 minute quadrangle map. Refer to Figure 1B. <br />Initial geological work in this azea was done by W. T. Lee (1912) who reported his findings in <br />"Coal Fields of Grand Mesa and the West Elk Mountains, Colorado" (USGS Bulletin 510). Later <br />in 1948, Vard H. Johnson published a USGS map of the Paonia Coal Field incorporating drill <br />hole data generated through a USGS and U.S. Bureau of Mines drilling program. The following <br />yeaz Johnson further described the geology of the Minnesota Creek azea in USBM Technical <br />Paper 721. More recently, in 1989, C.R. Dunrud compiled a coal resources map of the region <br />(USGS Map C-115). In progress from the Colorado Geological Survey is report on the coal <br />resources of the Somerset Quadrangle (CGS OFR 98-6). <br />The general stratigraphy of the azea consists of members of the Mesa Verde Formation of the <br />Upper Cretaceous System underlying the Wasatch Formation of Tertiary Age (see Figure 2). The <br />Barren Member of the Mesa Verde formation crops out lowest in the exploration azea with the <br />overlying Ohio Creek member exposed along many of the steeper slopes. Above the Mesa Verde, <br />rocks of the Wasatch Formation aze exposed. Capping most of the higher terrains are colluvial <br />deposits. The Upper and Lower Coal Members of the Mesa Verde Formation aze the major coal- <br />beazing units in the area. The A (King), B (Somerset), and C (Beaz) coal beds of the Lower Coal <br />Member and the D (Oliver), E (Hawks nest), and the F-Seam coal beads of the Upper Coal <br />Member have all been mined within the North Fork Valley. The extent of these coal beds beneath <br />the exploration area is only marginally defined. <br />The strata in the Dry Fork and Lions Mesa areas dip generally at 4 degrees to the north and <br />northeast. Steeper dips are assumed to occur in the proximity of the Mt. Gunnison laccolith <br />although the extent of folding is unknown at this time. <br />•~ <br />3 <br />