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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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The immediate roof was black shale that ranged from 24 to 36 inches thick. The caprock above the shale was 18 inches of black rock. Water came into the mine through cracks in the shale roof and via sandstone under the coal. The mine notes state that the pillars were largely pulled and subsidence had taken place before 1964. The coal had a pyrite and pyrite concretion layer about 18 inches below the roof.
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