Laserfiche WebLink
Fort Lewis College in Durango, Colorado. This report can be found in Exhibit 10 of the <br /> permit document. No sites were found as a result of the field study. <br /> 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 <br /> areas surveyed during the field reconnaissance. A literature search was conducted by <br /> WCRM, Inc. in September 1993. That search identified 15 cultural resource reports. Those <br /> reports are listed in Exhibit 10A. Exhibit IOB contains the results of the survey. Exhibit I I <br /> contains clearance documentation from the State Historic Preservation Officer. <br /> A Class II Cultural Resource Assessment was conducted by Metcalf Archeological <br /> Consultants, Inc., with the results of the assessment contained in a report dated January 1995. <br /> This report was submitted with Permit Revision No. 6 and is contained in Exhibit IOC. The <br /> State Historic Preservation Officer was contacted by the Division on August 21, 1995, and <br /> indicated concurrence with the submittal. <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 <br /> the 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 area lies on the southeast margin of the Piceance Basin and just south of Grand <br /> Mesa. The general geology of this area consists of gently (three to five degrees) <br /> north-northeast dipping beds of sandstone, shale, and coal of upper Cretaceous and early <br /> Tertiary age. <br /> The geologic formations exposed in the North Fork Drainage Basin consist of Late <br /> Cretaceous to Early Tertiary Age sedimentary strata, Tertiary Age igneous intrusives, and <br /> Quaternary Age alluvial and colluvial deposits. The units are described below in ascending <br /> 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 <br /> in this formation produce the numerous rock falls and landslides observed in the lower North <br /> Fork Drainage Basin (lunge, 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 <br /> sedimentary rocks. The Mesaverde Formation is the coal-bearing formation in the region and <br /> is divided into four main members; the Rollins Sandstone, the Lower Coal Bearing (Bowie) <br /> Member, the Upper Coal Bearing (Paonia) Member, and the Barren (Undifferentiated) <br /> Member (Johnson, 1948). <br /> The Rollins Sandstone is a white to buff-colored, well sorted, medium- to fine-grained <br /> sandstone, ranging from 150 feet to 300 feet thick. This sandstone is regionally extensive and <br /> resistant in outcrop and forms prominent cliffs. <br /> 7 <br />