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Author: Admin | 2025-04-28
5 Coal.—A number formerly applied to the Davis coal in western Kentucky, now known as No. 6; Tradewater formation.No. 6 Coal.—A number now generally applied to Davis coal, Union County; in upper part of Tradewater formation.No. 7 Coal.—A number applied to Dekoven coal, Union County; in upper Tradewater.No. 8 Coal.—A number originally applied to a thin coal in Union County; also known as Well coal; in lower Carbondale; probably equivalent to coal IIIa or IV of Indiana.No. 8b Coal.—A thin coal with black sheety shale roof in Carbondale formation; equivalent to the Goshen coal and probably to the IVa or Houchin Creek coal of Indiana, and No. 4 coal of southern Illinois. In Hopkins County and Ohio County this coal is overlain by the black shale and in turn by the dark Hanover limestone of Illinois. This marine zone is correlated (Wanless, 1939) with the cap rock of the Mulky coal of Missouri and Lower Fort Scott limestone of Kansas and Oklahoma.No. 9 Coal (= No. 5 or Springfield and Harrisburg coals of Illinois and the Petersburg or Alum Cave (No. 5) coal of Indiana).—This is the most important coal of the Western Coal Field. The roof is black shale, sometimes containing concretions of pyrite and side rite ranging up to several feet in diameter. The shale is often fossiliferous and referred to as "Pennywinkle rock" (= St. David limestone of Illinois). It is one of, if not the most, persistent commercial coals in the eastern United States.No. 10 Coal.—A thin coal in upper part of Carbondale formation; also called Briar Hill coal; equivalent to No. 5a coal of southern Illinois, and Grape Creek coal of eastern Illinois.No. 11 Coal.—This is the second ranking coal of the field and comes in just beneath the Providence limestone with a thickness of
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