|
Ordovician | Late Ordovician | Hirnantian | Ashgill | Hirnantian | | | 443.8 |
Katian | Rawtheyan | 445.2 |
Cautleyan | 448.9 * |
Pusgillian | 449.3 * |
Caradoc | Streffordian | Onnian † | 449.6 * |
Cheneyan | 451.5 * |
Burrellian | 452.7 * |
Sandbian | 453 |
Actonian † | 453.2 * |
Marshbrookian † | Woolstonian † | 454.2 * |
Longvillian † | 455.2 * |
Aurelucian | 456.8 * |
Soudleyan †/Harnagian/Costonian | | 457.4 * |
Middle Ordovician | Darriwilian | Llanvirn | Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn | | 458.4 |
Abereiddian/Early Llanvirn | 461.3 * |
Dapingian | 467.3 |
Arenig | Fennian | 468.4 * |
Early Ordovician | Floian | 470 |
Whitlandian | 471.1 * |
Moridunian | 474.3 * |
Tremadocian | Tremadoc | Migneintian | 477.7 |
Cressagian | 480.8 * |
| | 485 * |
| 485.4 |