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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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A sandstone cut the coal out in some places, and was 2 to 3 feet above the coal in other areas, and in some other areas, the sandstone was directly on the coal. A limestone was sometimes present, but only 2 to 3 inches thick. Generally the immediate roof was a black shale that was up to 16 inches thick. Horsebacks were found in the mine. A layer of pyrite was often present about 2 feet from the top of the seam, but generally pyrite occurred as lenses and streaks. More pyrite was present near the horsebacks. The floor clay heaved in wet places. Rolls in the floor also made the coal thinner and interfered with shooting the coal.
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