Gulfian Series
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
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Reference section
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Stratigraphic relationships
Extent and thickness
Lithology
Core(s)
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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
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