Eocene Series

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Lithostratigraphy: Embayment Megagroup
Chronostratigraphy: Cenozoic Erathem >>Tertiary System >>Eocene Series

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)

H. B. Willman and John C. Frye

Name

Original description

Eocene Series (Lyell, 1833).

Derivation

The Eocene, which means "dawn of the recent", was so named because its flora and fauna contained only a small proportion of recent species.

Other names

History/background

Type section

Type location

Type author(s)

Type status

Reference section

Reference location

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Stratigraphic relationships

The Eocene sediments are all assigned to the Wilcox Formation.

Extent and thickness

The Eocene Series (Lyell, 1833) in Illinois occurs in a small area in Pulaski and Alexander Counties. It is exposed only in Pulaski County in the hills from Mounds west to Cache Valley.

Lithology

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Age and correlation

Environments of deposition

Economic importance

Remarks

References

LYELL, CHARLES, 1833, Principles of geology: v. 3, London, p. 52-55, 57-58.

ISGS Codes

Stratigraphic Code Geo Unit Designation
1240
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