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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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Some faulting was noted, with up to 2 feet of displacement, which made for a steep grade along haulage routes. An area south of the hoist shaft caved to the surface where the old creek bed was located (north of current stream bed). Other areas of caving were noted on the source map, generally in areas where the roof would have been thin (NE SW 28-T8N-R2E, SW SW NE 28-T8N-R2E and SE NE NW 28-T8N-R2E). The caprock and sometimes immediate roof was limestone, ranging from 0 to 5 feet above the coal. Where limestone was not directly above the coal, the immediate roof was a gray shale clod without prominent laminations. The clod was difficult to keep up; areas noted for clod on the source map were E Β½ SE 21-T8N-R2E and SW NW SW 22-T8N-R2E. Thin coal stopped westward mining in SE SE & NW NE 28-T8N-R2E. Rolls were noted in the roof in some places. The coal seam contained pyrite bands. A few concretions were noted in the coal. Brownish laminated pyrite with carbonaceous material was present in lenses between the coal and cap rock. The lenses were up to 18 inches thick and sometimes continuous for up to 150 feet. There was more pyrite close to the crop and where the coal was thin. The underclay was 2.0 to 3.0 feet thick, but was very hard and did not heave (although the upper 8 to 10 inches softened on weathering). A squeeze was noted on the source map in NE NE SE 21-T8N-R2E.
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