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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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An overlying sandstone bed cut into the coal in some areas of the mine, but the roof over most of the mine was black shale. Top coal was left to support the roof. Small rolls and slips were also present in the coal. Pyrite balls were found in masses in the coal. The fireclay floor heaved in wet areas of the mine.
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