Caerfai - St Davids
| International Chronostratigraphic Timescale | Cambrian of Britain | ||||
|---|---|---|---|---|---|
| Cambrian | Furongian | Stage 10 | Merioneth | Dolgellian/Trempealeauan | 485.4 |
| Festiniogian | 489.2 * | ||||
| Jiangshanian | 489.5 | ||||
| Maentwrogian | 493.1 * | ||||
| Paibian | 494 | ||||
| Miaolingian | Guzhangian | St Davids | 497 | ||
| Drumian | 500.5 | ||||
| Wuliuan | 504.5 | ||||
| Series 2 | Stage 4 | Caerfai | 509 | ||
| Stage 3 | 514 | ||||
| Terreneuvian | Stage 2 | 521 | |||
| Fortunian | 529 | ||||
| 538.8 | |||||