Oandu Stage
| Belongs to | Vinni Subseries |
| Type | chronostratigraphy |
| Rank | Stage |
| Scope | regional |
| Status | formal standard |
| Author | Öpik |
| Year | 1934 |
| Etymon | Oandu, river (E) |
| Age top (Ma) | 453.2 |
| Age base (Ma) | 454.2 |
| Age (Ma) | Katian |
| Age reference | Cooper & Sadler, 2004 |
| Index | DIII |
| Alt. index | O3ON |
| Date changed | 2022-12-02 |
Locality | Type | From (m) | To (m) | Reference | Remarks | |
|---|---|---|---|---|---|---|
| Oandu River outcrop | holostratotype | Männil, Ralf, 1958e | ||||
| Piilse 7909 borehole | hypostratotype | 9.8 | 12.4 | Põlma et al., 1988 |
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