Type and reference sections and synonym: The name Stendal Limestone Member (of the Petersburg Formation) was proposed by Wier (1961, 1965) for the limestone previously known as the Houchin Creek cap (Weller, Henbest, and Dunbar, 1942, p. 32) or the Houchin Creek Limestone (Cooper, 1946, p. 16) and exposed near Stendal, Pike County, Ind. Wier designated the type section in the SE¼NE¼SW¼ sec. 3, T. 3 S., R. 7 W., and a reference section in the NE¼SW¼ sec. 12, T. 3 S., R. 7 W.
Description: The Stendal Limestone Member is a black limestone that is dense, argillaceous, and fossiliferous in places. It ranges from 1 to 3 feet (0.3 to 0.9 m) in thickness. It overlies a black shale, 1 to 3 feet (0.3 to 0.9 m) thick, which separates this limestone from the underlying Houchin Creek Coal Member (Wier, 1961, 1965).
Correlation: The Stendal is probably correlative with the Hanover Limestone Member of western Illinois and with the black limestone overlying the Ruff Coal (Western Kentucky No. 8b) in Kentucky.