Negli Creek Limestone Member

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Lithostratigraphy: Pope Megagroup >>Kinkaid Limestone >>Negli Creek Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Mississippian Subsystem >>Chesterian Series >>Elviran Stage
Allostratigraphy: Kaskaskia 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)

Elwood Atherton, Charles Collinson, and Jerry A. Lineback

Name

Original description

The Negli Creek Limestone Member of the Kinkaid Formation (Logan, 1924, p. 11, 125; Malott, 1925, p. 112-114; Swann, 1963, p. 75).

Derivation

Named for Negli Creek, Perry County, Indiana.

Other names

History/background

Type section

Type location

The type section of the Negli Creek Limestone Member is located along Negli Creek, Perry County, Indiana, in an exposure of 12 feet of limestone (NW 36, 6S-3W).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The Negli Creek Limestone Member is the lowermost member of the Kinkaid Formation.

Extent and thickness

The Negli Creek Limestone thickens southward from 16 feet in Effingham County to 37 feet in Franklin County.

Lithology

In Illinois the Negli Creek Limestone Member is a massive limestone very similar in thickness and lithology to the Goreville Limestone Member but more extensive. Most of the limestone is brownish gray, but it has some light gray and brown beds. It is very fine grained but includes coarse grains of fossils. In places the lower part is lithographic. It is cherty, particularly in the upper part, but generally less cherty than the Goreville Member.

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Algal growths (Girvanella) are common in the lower part of the Negli Creek, and large gastropods and small biserial Foraminifera occur near the middle.

Age and correlation

Environments of deposition

Economic importance

Remarks

References

LOGAN, W. N., 1924, Geological conditions in the oil field of southwestern Indiana: Indiana Department of Conservation Publication 42, 125 p.
MALOTT, C. A., 1925, Upper Chester of Indiana: Indiana Academy of Science Proceedings (1924), v. 34, p. 103-132.
SWANN, D. H., 1963, Classification of Genevievian and Chesterian (Late Mississippian) rocks of Illinois: Illinois State Geological Survey Report of Investigations 216, 91 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation
4090
Mk-nc