Gulfian Series

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Lithostratigraphy: Embayment Megagroup
Chronostratigraphy: Mesozoic Erathem >>Cretaceous System >>Gulfian 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

The Gulfian Series (Hill, 1887, p. 298, 300).

Derivation

Named for its occurrence along the Coastal Plain of the Gulf of Mexico, and is presumed to include all Cretaceous rocks in Illinois.

Other names

History/background

Type section

Type location

Type author(s)

Type status

Reference section

Reference location

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Stratigraphic relationships

Extent and thickness

Lithology

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Age and correlation

In southern Illinois most of the Cretaceous rocks were deposited during the youngest part of the Gulfian, although the basal Tuscaloosa Formation may represent early deposits of the series. Cretaceous rocks in western Illinois were probably deposited during early Gulfian time.

Environments of deposition

Economic importance

Remarks

References

HILL, R. T., 1887, Topography and geology of the Cross Timbers and surrounding regions in northern Texas: American Journal of Science, v. 33, p. 291-303.

ISGS Codes

Stratigraphic Code Geo Unit Designation
1370
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