bn:00058874n
Noun Named Entity
Categories: Oligocene, Earth Impact Database, Geological epochs, Paleogene geochronology
EN
Oligocene  Oligocene epoch  Climate of the Oligocene  Lattorfian  Middle Oligocene
EN
From 40 million to 25 million years ago; appearance of sabertoothed cats WordNet 3.0
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EN
From 40 million to 25 million years ago; appearance of sabertoothed cats WordNet 3.0 & Open English WordNet
The Oligocene is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present. Wikipedia
third and last epoch of the Paleogene period Wikidata
The Oligocene epoch. Wiktionary
Oligocene epoch. Wiktionary (translation)