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Cenozoic
Era: 65.5 Million Years to Present
Paleogene Period: 65.5-23
Million Years Ago
The
second largest mass extinction marks the end of the Mesozoic Era and the beginning
of the Cenozoic Era. The Paleogene Period marks the beginning of the Cenozoic
Era and extends from 65.5 to 23 million years
ago. The Paleogene time Period is subdivided into the
Paleocene,
Eocene
and Oligocene
Epochs. Paleogene is derived from Greek and means "ancient birth".
The Paleogene period is most notible for the adaptive radiations of mammals
and birds following
the extinction of non-avian dinosaurs. Both mammals and birds would evovle
into essentially modern forms during the Paleogene. Use the drop down menu
above or click on the pictures below to explore the epochs of the Paleogene.
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