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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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The east-west pit (11 & 12-T8S-R1W) north of the De Soto-Hurst blacktop (state route 149) mined only the Herrin Coal, which had no splits. The plan was to open a new pit south of that blacktop when the dragline was completed (expected Feb/Mar 1978), to mine both Herrin & Springfield Coals. That coal was projected to be mined out by Aug/Dec 1979, then the big dragline was to move west of the prep plant where the Herrin Coal was split into several benches. The pit in 11 & 12-T8S-R1W had an erosional channel (up to 25 feet thick or more) filled with sandstone above the coal through a part of the pit. This sandstone discharged some water into the pit. These were Walshville Channel sediments, sometimes replacing the upper part of the coal and sometimes eroding part of the coal. Another part of that pit showed the strongly undulating coal surface. Methane gas bubbled out of the coal into the water in the pit. The shale above the coal in this pit was gray or dark gray. Pyrite was present as fracture facings, but no bands were noted. The Herrin Coal was present in both low sulfur and high sulfur qualities, depending on the depositional history of the area of the pit. Calcite veins and pyrite veins were present near a fault in the Herrin Coal (SE 2-T8S-R1W). (Displacement on the fault was not noted, and may have been small.) In the eastern pits, the Herrin Coal was split into two benches. The Energy Shale was 12 to 15 feet thick over 1 to 1.5 feet of coal in the upper bench. The interburden was 12 to 15 feet of gray silty shale above the 6 feet thick lower bench of the Herrin Coal.
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