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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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The limestone caprock was 1.5 to 2.0 feet above the coal, and was only solid locally, averaging 7 inches thick. Below the limestone was 1 foot of clod and 1 foot of massive black shale that stuck to the coal. Some concretions were present, fewer than other mines in the area. These concretions were fairly large, 5 by 24 inches. Thin pyrite lenses were common the lower part of the shale. Horsebacks were numerous, averaging 15 to 20 feet apart. Pyrite was heavier near the horsebacks, generally occurring as soft “brown sulphur”. Thin clay seams were also present in the coal. The floor was 2 feet of fire clay that heaved badly when exposed to air and more so when wet. The mine was generally dry.
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