Rhuddanian
General info
| Belongs to |
Llandovery
|
| Type | chronostratigraphy |
| Rank | Stage |
| Original rank | lade |
| Scope | global |
| Status | formal standard |
| Etymon | Cefn-Rhuddan Farm, Llandovery area |
| Age top (Ma) | 440.8 |
| Age base (Ma) | 443.8 |
| Date added | 2003-04-02 |
| Date changed | 2022-11-04 |
| Reference | Content | Year1 | Pages | Remarks |
|---|---|---|---|---|
| Gradstein et al., 2004 |
2004
| |||
| Gradstein et al., 2012 |
2012
| 632 - 670 | ||
| Melchin et al., 2020 |
2020
| 695-732 |
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