Saturday, May 01, 2004

Gulf Series

Major division of Upper Cretaceous rocks (66.4 to 97.5 million years old) in the Gulf coastal region of the United States. The Gulf Series has been divided into several groups of rocks. The lowermost groups of limestone and clay are overlain by the Eagleford Shale, about 145 m (475 feet) of clayey shales, which in turn is overlain by the Austin Chalk, about 130 m (420 feet) of chalks and marls. The Taylor

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