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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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One normal fault with 12 inches of displacement in the western part of the mine was noted. That fault trended SE-NW, and was traced about 2,000 feet. A smaller E-W-trending fault was found in two rooms only. The roof immediately above the coal was a good black shale from 2 to 10 feet thick that generally held well. Top coal was left to support the roof locally. The source map labeled the western part of the mine βcavedβ, as well as the easternmost part. Pillars were drawn in the northeastern and southernmost parts of the mine. Calcareous clay veins up to 4 inches wide were noted. Gypsum was present throughout the seam. Pyrite was present as lenses or in stony or massive form. Much of this pyrite was removed prior to loading and left in the mine. The lowest part of the coal seam above the blue band had the highest sulphur content. The coal thickness varied more below the blue band than above it. Where the coal totaled 7 feet thick, the blue band was 8 inches above the floor. Where the coal was 6 feet thick, the blue band was 4 to 5 inches above the floor. The blue band was up to 2 inches thick, and consisted of bone coal that was often highly pyritic; perhaps 30 to 50 per cent of the blue band consisted of pyrite. The fire clay making the floor was 8 feet thick or more, and sometimes slacked and creeped.
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