Gisbornian age - Eastonian age
| International Chronostratigraphic Timescale | Ordovician of Australia | |||
|---|---|---|---|---|
| Ordovician | Late Ordovician | Hirnantian | Bolindian | 443.8 |
| Katian | 445.2 | |||
| Eastonian | 449 * | |||
| Gisbornian | 452 * | |||
| Sandbian | 453 | |||
| Middle Ordovician | Darriwilian | Darriwilian | 458.4 | |
| Dapingian | Yapeenian | 467.3 | ||
| Castlemainian | 468.5 * | |||
| Early Ordovician | Floian | Chewtonian | 470 | |
| Bendigonian | 471.8 * | |||
| Lancefieldian | 473.5 * | |||
| Tremadocian | 477.7 | |||
| Warendian | 482.8 * | |||
| 485.4 | ||||