Haq, Bilal U. Division of Ocean Sciences, National Science Foundation, Arlington, Virginia.
Last reviewed:December 2019
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- Tectonics, oceans and climate
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The third oldest of the seven geological epochs of the Cenozoic Era. It corresponds to an interval of geological time (and rocks deposited during that time) from the close of the Eocene Epoch to the beginning of the Miocene Epoch (Fig. 1). The most recent geological time scales assign an age of 33.9 to 23 million years ago (MYA) to the Oligocene Epoch. See also: Cenozoic; Eocene; Miocene
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