Historical:Gulfian Series
Lithostratigraphy: Embayment Megagroup
Chronostratigraphy: Mesozoic Erathem >>Cretaceous System >>Gulfian Series
Authors
H. B. Willman and John C. Frye
Name Origin
The Gulfian Series (Hill, 1887, p. 298, 300) is named for its occurrence along the Coastal Plain of the Gulf of Mexico, and is presumed to include all Cretaceous rocks in Illinois.
Description
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.
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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