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State Reg. <br />• south with dips ranging between 6° and 19° to the west. The mining is <br />now proceeding around the tow of the anticline changing the strike of <br />coal to the east. The strike and dip of the coal seams are shown in <br />Exhibit 6-2. <br />To further illustrate the structure of the Seneca II Mine area, <br />Exhibits 6-9 through 6-I I are maps which give structural contours of the <br />top of both Wadge Coal Seam and Wolf Creek Coal Seams, isopachs of <br />the overburden, and isopachs of the coal seams, respectively. Each of <br />these show the outcrops of the coal and locations of cross-sections which <br />were presented earlier in Exhibits 6-3 through 6-8. From these maps and <br />cross-sections, the structure of the Seneca II Mine area may be delin- <br />eated. <br />As illustrated in the structural contour mop in Exhibit 6-9, both the <br />Wadge Coal Seam and tfie stratigraphically lower Wolf Creek Coal Seam <br />are steeply dipping (6° to 19°). The steepest dipping portion of the <br />Wadge Seam is found in the southwestern portion of the mine area which <br />is 19° to the southwest. The Wolf Creek Coal which has been mined or is <br />to be mined in the northeastern portion dips up to 14° in the northern <br />part and lessens in the southern part to between 7° and 10°. Also shown <br />on this map is the irregular rolling of the Wolf Creek Coal in the <br />southern portion of the mine area. This primarily represents local <br />flexures toward the crest of the anticline where pressures and tension <br />during deformation were more intense. <br />The overburden and coal isopach maps of the Wadge and Wolf Creek Coal <br />Seams (Exhibits 6-10 and 6-I I) show mainly depositional features rather <br />than structural implications. Small depositional basins where there is <br />thickening of coal may be found in the Wadge and Wolf Creek Seams. <br />The largest is in the Wadge Seam located in the NW9n SE9e of Section 2, <br />TSN, R87W where the coal thickens from 9 to 13 feet. Lensing out of <br />the coal also occurs due to depositional or erosion features. One <br />illustration is in the Wolf Creek Coal Seam in Section I, TSN, R87W <br />where the coal thins from 16 feet to 4 feet thick. The structural rolling <br />of the Wolf Creek Coal is also shown on the isopach map (Exhibit 6-I I) <br />6-9 Revised 5/27/1981 <br />