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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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The cap rock was 8 inches of limestone with 18 inches of clod above that. The clod and shale above the limestone contained a great deal of water and where falls occurred, a water problem in the mine resulted. Below the limestone was 12 inches of black shale. In general, the roof was said to be good, with a smooth clean roof left when the coal is removed. However, in the spots where the shale adhered to the coal, the roof was weakened at that spot and all the shale up to the cap rock came down. A few horsebacks were noted, perhaps as many as one every 50 to 75 feet, but they were said to be “not especially troublesome”. The coal had thin clay partings, generally about 8 and 20 inches below the top of the seam. Thick plates of pyrite were seen and pyrite balls were noted in the face of several rooms. At the base of the coal was a 1 to 3 inch thick bed of black jack. The blackjack was present over about 25% of the mine, and was composed of soft carbonaceous shale and coal, with lenses of pyrite up to about 1 inch thick. This layer of black jack came up with the coal and had to separated by the miner.
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