Oligocene
General info
| Belongs to |
Paleogene
|
| Type | chronostratigraphy |
| Rank | Series |
| Scope | global |
| Status | formal standard |
| Age top (Ma) | 23.03 |
| Age base (Ma) | 33.9 |
| Index | E3 |
| Date changed | 2022-11-04 |
| Reference | Content | Year1 | Pages | Remarks |
|---|---|---|---|---|
| Gradstein et al., 2004 |
2004
| |||
| Gradstein et al., 2012 |
2012
| |||
| Speijer et al., 2020 |
2020
| 1087-1140 |
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