| 单词 | Oligocene epoch |
| 释义 | Oligocene epoch (once / 2954828 pages) n WORD FAMILY Oligocene epoch USAGE EXAMPLESThis dating places the discovery in the Oligocene epoch, which extends from about 34 million to 23 million years ago. Scientific American(May 16, 2013) That means that pelicans and their huge beaks have survived unchanged since the Oligocene epoch, say the scientists in the Journal of Ornithology. BBC(Jun 11, 2010) n from 40 million to 25 million years ago; appearance of sabertoothed cats Syn|Exp Oligocene epoch a unit of geological time that is a subdivision of a period and is itself divided into ages |
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