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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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Some faulting was present. One thrust fault was described, and the coal was overthrust for a 16-foot distance, giving a double coal thickness of 7 feet. The roof was gray shale over most of the mine (about 95%). The gray shale was full of slips. Pyrite was present in elongated nodules and lenses parallel to bedding. The roof was reported to be bad where the roof was black shale, because the black shale was filled with slickensided slip planes that caused it to come down in irregular masses. The black shale roof occurred 0 to 18 feet above the coal, and contained concretions up to several feet in diameter. Some rolls were noted. The coal contained pyrite bands and some lenticular nodules of pyrite. In the top of the seam, the pyrite was mixed with carbonaceous dirt. The floor was over 10 feet of fire clay that heaved very badly. This underclay was sandy in some places. The clay was mined where it was free of sand.
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