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Additional surveys for Jumbo Mountain were completed by Western Cultural Resource <br />Management, Inc. (WCRM, Inc.} during October and November 1993. Map 7A shows the areas <br />surveyed during the field reconnaissance. A literature search was conducted by WCRM, Inc. in <br />September 1993. That seazch identified 15 cultural resource reports. Those reports are listed in <br />Exhibit 10A. Exhibit l OB contains the results of the survey. Exhibit 11 contains clearance <br />documentation from the State Historic Preservation Officer. <br />A Class II Cultural Resource Assessment was conducted by Metcalf Archeological Consultants, <br />Inc., with the results of the assessment contained in a report dated January 1995. This report was <br />submitted with Permit Revision No. 6 and is contained in Exhibit l OC. The State Historic <br />Preservation Officer was contacted by the Division on August 21, 1995, and indicated <br />concunence with the submittal. <br />The State Historical Preservation Office indicated in a letter to DMG dated Apri122, 2004 that <br />the mining proposed in Permit Revision No. 10 will have no effect on historical properties <br />because the revision proposes no additional disturbance to the land surface. <br />Geology -Rules 2.04.5 and 2.04.6 <br />The applicant describes the geology of the permit and adjacent area in Section 2.04.5 of the <br />permit document. Additional information is detailed on Map 9, which details the geology of the <br />lease area, as well as the coal outcrop line and the strike and dip for the F and B Seams. <br />Stratigraphic information is shown on Maps 10 through 23. <br />The permit azea lies on the southeast margin of the Piceance Basin and just south of Grand Mesa. <br />The general geology of this area consists of gently (three to five degrees) north-northeast dipping <br />beds of sandstone, shale, and coal of upper Cretaceous and early Tertiary age. <br />The geologic formations exposed in the North Fork Drainage Basin consist of Late Cretaceous to <br />Early Tertiary Age sedimentary strata, Tertiary Age igneous intrusives, and Quaternary Age <br />alluvial and colluvial deposits. The units are described below in ascending order. <br />The Mancos Shale is the oldest stratum exposed in the region, and is of Late Cretaceous Age. <br />This unit is composed of over 4,000 feet of gray marine shales and minor interbedded buff <br />sandstones. This unit is highly erodible and unstable. Erosion and oversteepening of slopes in <br />this formation produce the numerous rock falls and landslides observed in the lower North Fork <br />Drainage Basin (Junge, 1978). <br />The Mesaverde Formation is of Late Cretaceous Age and conformably overlies the Mancos <br />Shale. This formation consists of approximately 2,300 feet of marine and terrestrial sedimentary <br />rocks. The Mesaverde Formation is the coal-beazing formation in the region and is divided into <br />four main members; the Rollins Sandstone, the Lower Coal Beazing (Bowie) Member, the Upper <br />Coal Bearing (Paonia) Member, and the Barren (Undifferentiated) Member (Johnson, 1948). <br />The Rollins Sandstone is a white to buff-colored, well sorted, medium- to fine-grained sandstone, <br />ranging from 150 feet to 300 feet thick. This sandstone is regionally extensive and resistant in <br />outcrop and forms prominent cliffs. <br />27 <br />