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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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Several types of structural features are common here: large, high-angle faults apparently of tectonic origin (Rend Lake Fault System) with 1 to 6 feet of displacement, steep high-angle fractures or slips in coal or roof (tectonic origin), minor slips in roof shale (soft-sediment compaction features), and βXβ pattern faults (usually two faults intersecting at the top of the coal). The roof was medium gray shale, finely silty and micaceous, finely laminated, firm, with fine sideritic laminations and nodules. The northwestern corner of the property had split coal, where the blue band thickened from its normal 2 to 3 inches up to 24 inches. (This area is adjacent to the Walshville channel.) At least one large roll was present, plus a series of small rolls. About 12 inches of top coal was left to support the roof throughout the mine.
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