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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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Some slips and rolls were encountered. All the faults were small but some extended down into the coal. The rolls were common within 150 feet of the shaft, and were associated with concretions in the roof shale. The roof was very difficult to keep up in the north-south entries, while the roof in the east-west entries held much better. The Du Quoin Anticline is about 10 miles northeast of the mine, and the regional stresses may have caused the roof problems. Limestone, up to 8 feet thick, was the cap rock in this mine. Between the coal and the limestone was a dark shale that occasionally pinched out completely. The coal was thicker east of the shaft than west of the shaft. Pyrite was present in patchy spots, 5 to 9 inches above the underclay, generally in lenses. This pyrite was easily rejected in the mine, by tapping it free from the coal.
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