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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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An igneous dike was present 500 feet south of the north section line of sections 13 and 14. This dike was 15 feet wide. About 10 feet southwest of the main dike, a smaller dike cut through the Davis Coal. Another smaller (2 to 3 feet wide) dike was present about 500 to 600 feet southwest of the main dike. These dikes were near a 100-foot wide graben. The overburden was mainly sandstone and shale, which was fractured in some locations. This made the highwall expensive to maintain and dangerous to work near. Calcite was present in the coal as fracture fillings. Pyrite was present in lenses and fracture fillings. Some of the seams had high sulfur and ash content (as well as high Btu values) and were not mined at all locations.
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