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Depth, Thickness and Horizontal Extent <br /> Correlation of these lithologic logs indicates that there <br /> are significant sand zones that may or may not be water <br /> saturated in the Coal Basin Mine lease area. These three <br /> sands are the "upper sandstone" associated with the Placita <br /> seam, the "middle sandstone" associated with the V seam, and <br /> the Rollins sandstone associated with the B seam. In the <br /> Coal Basin affected area the "upper sandstone" is approximately <br /> 50 feet thick, the middle sandstone is 120 feet thick and the <br /> Rollins sandstone is approximately 140 feet in thickness . <br /> tx�;b,-� LT—C 1 <br /> 4'e---1 Coal Basin ;dine vicinity shows the outcrop of <br /> these three sandstone units throughout Coal Basin and <br /> outcropping to the north and south along the Grand Hogback. <br /> It can be assumed from the outcrops and from the good <br /> correlation seen in the logs of the drill holes that <br /> these three sandstone units extend throughout the Coal <br /> Basin Mine adjacent area. From lithologic logs of coal <br /> mining areas , Collins has traced these three sandstone <br /> units from Coal Basin and North Thompson Creek area, <br /> along the Grand Hogback to the north, up to the Meeker area, <br /> a linear distance of approximately 75 miles . <br /> Plate I presents structural contours on the top of the <br /> Rollins sandstone based on drill hole data and the dip <br /> measured at the outcrop . Plate 1-1 is a geologic cross <br /> section showing the relationship of the three sand units <br /> 15 <br />