Effingham Limestone Member

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Lithostratigraphy: McLeansboro Group >>Mattoon Formation >>Effingham 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 Effingham Limestone Member of the Mattoon Formation (Wanless, 1956, p. 7, 12).

Derivation

Named for Effingham, Effingham County.

Other names

History/background

Type section

Type location

The type section consists of outcrops in the east-flowing tributary to Salt Creek just south of Effingham (S line NW 33, 8N-6E).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

Extent and thickness

This limestone has not been recognized far from the type area.

Lithology

It is a 1-foot bed of granular conglomeratic limestone containing numerous brachiopods, gastropods, crinoids, and a few corals. A thin, black fissile shale occurs about 3 feet above the Effingham Limestone.

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Age and correlation

Environments of deposition

Economic importance

Remarks

References

WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation
1680
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