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The Lower Coal Bearing (Bowie) member consists of 260 to 350 feet of interbedded gray shales, <br />thin to thick lenticulaz beds ofbuff-colored, fine- to medium-grained sandstones, and coals. The <br />top of the member is usually capped by a massive buff-colored sandstone up to 90 feet in <br />thickness. This sandstone, however, appears not to be a single persistent bed, but is actually <br />several thick lenticulaz sandstones occurring at progressively lower stratigraphic horizons from <br />east to west. <br />Three coal beds exist in the Lower Coal Beazing member - the A (Old King) horizon, the B <br />(Somerset) horizon, and the C (Bear) horizon. The A horizon is immediately above the Rollins <br />sandstone and is not currently mined. The B horizon contains two coal seams and occurs about <br />20 to 120 feet above the Rollins sandstone. The C horizon contains one coal seam that occurs 50 <br />to 100 feet above the B horizon. <br />The Upper Coal Bearing (Paonia) member consists of 200 to 500 feet of gray shales, interbedded, <br />buff-colored, lenticular sandstones, and coals. The top of [his member usually grades into a <br />massive, cliff-forming sandstone. However, like the similar sandstone at the top of the Lower <br />Coal member, this sandstone is not a single persistent bed. <br />Three coal horizons have been identified in the Upper Coal member - the D (Oliver) horizon, the <br />E (Hawk's Nest) horizon, and the F horizon. The D horizon occurs directly above the "massive" <br />sandstone of the Lower Coal Bearing member and contains three seams. This horizon was <br />mined in the Bowie No. 1 Mine. The E horizon occurs about 130 feet above the D horizon and <br />contains two coal seams. The F horizon contains two coal seams. Coal seams of [he F horizon <br />do not exist to the north of the North Fork in thicknesses sufficient for mining. <br />The Barren (Undifferentiated) member of the Mesaverde Formation consists of up to 1,500 feet <br />of terrestrial sedimentary rocks. This unit consists of fine-grained, buff-colored, lenticular <br />sandstones, gray shales and thin, lenticular coal beds. The sandstones predominate and are <br />highly lenticulaz, discontinuous and of limited lateral extent in outcrop. <br />The Mesaverde Formation is unconformably overlain by the Tertiary Age Rudy or Wasatch <br />Formation. This formation consists of red to buff-colored shales, red sandstones, and red to gray <br />conglomerates. The sediments of this formation are weathered volcanic rocks. The Ohio Creek <br />conglomerate is the basal unit within the formation and is 100 to 200 feet thick. <br />Tertiary igneous intrusive rocks exist within the North Fork drainage basin. A diorite plug about <br />1,000 feet in diameter outcrops along Hubbard Creek in the SE 1/4 of Section 7, Township 13 <br />South, Range 91 West of the 6th P.M. This may represent the erosional remnants of a volcanic <br />flow feeder. Sills have injected the Lower Coal Bearing member, particularly the B and C seams. <br />These sills consist of diorite and appear to have their source to the northwest of Terror Creek. <br />H~roloQic Balance -Rules 2.04.5, 2.04.7. 2.05.3, 2.05.6(3), 4.05 <br />Ground Water - <br />13 <br />