Pirgu Stage
| Belongs to | Atla Subseries |
| Type | chronostratigraphy |
| Rank | Stage |
| Scope | regional |
| Status | formal standard |
| Author | Jaanusson |
| Year | 1944 |
| Age top (Ma) | 445.6 |
| Age base (Ma) | 449.8 |
| Age (Ma) | Katian |
| Age reference | Cooper & Sadler, 2004 |
| Index | FIc |
| Alt. index | O3PRG |
| Date changed | 2021-04-21 |
Locality | Type | From (m) | To (m) | Reference | Remarks | |
|---|---|---|---|---|---|---|
| Pirgu River outcrops | holostratotype | Rõõmusoks, 1967a | Pirgu River bank |
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