Greenup Limestone Member
Lithostratigraphy: McLeansboro Group >>Mattoon Formation >>Greenup Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Virgilian Series
Allostratigraphy: Absaroka Sequence
Primary source
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.
Contributing author(s)
M. E. Hopkins and J. A. Simon
Name
Original description
The Greenup Limestone Member of the Mattoon Formation (Newton and Weller, 1937, p. 9, 26).
Derivation
Named for Greenup, Cumberland County.
Other names
History/background
Type section
Type location
The type section consists of exposures along the valley wall of the Embarras River just west of Greenup (cen. W 1/2 NE 3, 9N-9E) (Kosanke et al., 1960, p. 41, 51, 79).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
The Greenup Limestone Member is the youngest named member of the Mattoon Formation.
Extent and thickness
The Greenup is known from several outcrops in the northern part of the area of the Mattoon Formation in Jasper, Cumberland, and Coles Counties, where it is as much as 8 feet thick and has been quarried locally.
Lithology
The Greenup is a relatively pure limestone with an abundant open-marine fauna.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
The open-marine fauna of the Greenup is dominated by brachiopods and crinoids but also includes a few corals and locally abundant fusulinids.
Age and correlation
Environments of deposition
It represents a major marine transgression into Illinois.
Economic importance
Remarks
References
KOSANKE, R. M., J. A. SIMON, H. R. WANLESS, and H. B. WILLMAN, 1960, Classification of the Pennsylvanian strata of Illinois: Illinois State Geological Survey Report of Investigations 214, 84 p.
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.
ISGS Codes
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