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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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The cap rock was 2 to 6 inches of limestone, which made a good roof except where it was thin. Horsebacks were seen in the coal, consisting of a stringer of clay cutting through the coal from the roof to the floor. The horsebacks generally averaged 12 inches wide, but ranged up to 36 inches wide. The mine as a whole was very wet and muddy.
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