Sillaoru Formation
| Belongs to | Baltic lithostratigraphy (Ordovician) |
| Type | lithostratigraphy |
| Rank | Formation |
| Scope | regional |
| Status | formal standard |
| Author | Grigelis |
| Year | 1978 |
| Etymon | Sillaoru, watermill (E) |
| Original locality | Purtse river bank at Sillaoru |
| Age (Ma) | Kunda Stage |
| Index | BII-IIIS |
| Alt. index | O2sl |
| Date added | 2009-10-02 |
| Date changed | 2024-06-25 |
Locality | Type | From (m) | To (m) | Reference | Remarks | |
|---|---|---|---|---|---|---|
| Purtse river | holostratotype | Purtse river bank at Sillaoru |
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