Greenup Limestone Member

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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

Stratigraphic Code Geo Unit Designation
1570
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