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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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A sandstone paleochannel was present above the coal, sometimes cutting out the limestone and massive gray shale above the coal. This sandstone held considerable water, which worked its way into the shale. The roof was practically impossible to keep up. After the shale came down, generally everything below the sandstone would eventually come down, sometimes up to 20 feet of material. The shaley limestone was only 2 to 8 inches thick, and had no supportive strength. The dark gray shale also had no supportive strength and fell readily. There was some black shale above the coal, and this contained large concretions, some over 1 foot thick and 2 feet long. The coal was very uniform in thickness except near horsebacks or rolls. Bedded impurities included thin streaks of clay and mother coal, and, on the eastern side of the mine, bands of brown pyrite that were 1.5 inches thick and up to 5 feet long. The eastern side of the mine had very poor conditions, including numerous horsebacks and blind slips in the coal and roof rock, which appeared to be horsebacks with no clay filling. The roof was very poor near these blind slips. The underclay floor heaved when wet and held water so that it was difficult to drain.
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