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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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A number of small underground mines in SE 22-T5S-R6W were mined through. These underground mines were 18 to 25 feet deep. The roof over the Herrin Coal had a sharp contact with the coal. The Herrin Coal had a lot of white calcite on the cleats and vertical fracture facings and pyrite in small veinlets and small lenses. The overburden on the Springfield Coal included 5 feet of limestone above 18 inches of fissile carbonaceous black shale. The Springfield Coal had a lot of visible pyrite in the form of finely crystalline cleat fillings and thick pyrite lenses and band up to 2 inches thick. The pyrite lenses and bands were especially noticeable about 20 inches above the base of the coal. The Springfield Coal had a sulfur content of about 3.5%. The sulfur content of the Herrin Coal was about 3%.
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