| NOUN | time | Eocene epoch, Eocene | from 58 million to 40 million years ago |
|---|
| Meaning | From 58 million to 40 million years ago; presence of modern mammals. | |
|---|---|---|
| Synonym | Eocene | |
| Instance of | epoch | A unit of geological time that is a subdivision of a period and is itself divided into ages |
| Part of | Tertiary, Tertiary period | From 63 million to 2 million years ago |
| Spanish | eoceno | |
| Catalan | eocè | |
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