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Willman, H. B., Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.
M. E. Hopkins and J. A. Simon
The Woodbury Limestone Member of the Mattoon Formation (Newton and Weller, 1937, p. 9, 28-30).
Named for Woodbury, Cumberland County.
The type section consists of exposures on a tributary to Webster Branch about 2 miles southwest of Woodbury (S 1/2 SE 32, 9N-8E).
The Woodbury has not been recognized outside the type area.
In the type section the Woodbury is a hard, gray, calcareous ironstone layer 3-4 inches thick that contains numerous brachiopods, crinoids, and a few corals. It is separated from an underlying 5-inch coal by a few inches of black coaly shale.
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NEWTON, W. A., and J. M. WELLER, 1937, Stratigraphic studies of Pennsylvanian outcrops in part of southeastern Illinois: Illinois State Geological Survey Report of Investigations 45, 31 p.
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