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<br /> <br />W <br />N <br />c...., <br />o <br /> <br /> <br />J:IDl Subbituminous <br />~ Low-volatile bituminous <br /> <br />e:za Medium and high-volatile <br />bituminous <br /> <br />IDJlI]J Anthracite and semianthracite <br /> <br />Dark color: Known accessible cool <br /> <br /> <br />Figure 7. Coal deposits in the Upper Colorado Basin. <br /> <br />River. Seven coal fields located in the <br />U iota Region portion of Colorado are: Grand <br />Mesa, southern part of the Piceance Creek; <br />Somerset in Delta and Gunnison County and <br />eastern Garfield County; Grand Hogback, <br />between Garfield and Rio Blanco; Danforth <br />Hills, in the northeast flank of the Piceance <br />Creek in Rio Blanco; and the Lower White <br />River field which lies between the Danforth <br />Hills field and the Colorado state line. At <br />present, underground mining is the mOst <br />amenable recovery method in this region. <br /> <br />San Juan Rivet' Region <br /> <br />The San Juan River region comprises the <br />Colorado portion of the San Juan Basin of New <br /> <br />Mexico and Colorado. The region is drained <br />by the San Juan River and its tributaries. <br />The coal occurs principally in the Fruitland <br />Formation and in the Menefee Formation of the <br />Mesaverde group. The coal in the region is <br />of high-volatile bituminous rank, with <br />coal of the Menefee Formation ReOerally <br />having a lower ash content than the coal of <br />the Fr,uitland Formation and Dakota sandstone. <br />The Pagosa Junction district in Archuleta, <br />the Bayfield-Yellowjacket Pass district <br />in Archuleta and La Plata Counties, the <br />Durango field and Red Mesa area in La Plata <br />and Montezuma Counties and the Mesaverde area <br />west of Mesaverde National Park are amon~ <br />major coal areas in the San Juan River region <br />portion of Colorado. The Banker Creek area, <br />the Fruitland area, the Hogback field, the <br /> <br />32 <br />