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Defined first from the Aquitanian Basin, France, the Aquitanian Age marks the beginning of the Miocene, 23.03 Ma ago. It also marks the start of the Upper Cenozoic (Neogene) Period of time. The Aquitanian is itself characterized by the appearance of the planktonic foraminiferid Globigerinoides primordia.

Subjects: Biological Sciences — Earth Sciences and Geography.

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