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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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Most of the geological problems noted on the source map were related to areas that are ravines on the topographic map, where the roof and coal may have been eroded. Clod top was noted on the western side, which halted expansion to the northwest. On the eastern side of the mine, areas that were labeled βbad topβ were near the ravines, but the easternmost entries hit coal that thinned down to less than 2 feet thick. As the mine extended south, the coal also seemed to thin to 3.17 feet and less
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