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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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The roof was a very black, sheety shale that had many concretions of all sizes, up to several feet in diameter. The concretions frequently extended down into the coal. An entry in the mine notes indicate that pillars were robbed or made as small as possible so that the roof often caved after the rooms were worked out. The coal was very clean but had some clay veins and horsebacks and a very few plates and horizontal bands of pyrite. Several of the horsebacks cut entirely through the coal and ranged from 3 to 15 feet wide. The floor was a dark gray fire clay that heaved slightly.
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