Woodbury Limestone Member
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).
Extent and thickness
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.
Well log characteristics
Age and correlation
Environments of deposition
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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