Ludfordian
General info
Belongs to |
Ludlow
|
Type | chronostratigraphy |
Rank | Stage |
Original rank | lade |
Scope | global |
Status | formal standard |
Age top (Ma) | 423 |
Age base (Ma) | 425.6 |
Date added | 2003-04-02 |
Date changed | 2022-12-28 |
Reference | Content | Year1 | Pages | Remarks |
---|---|---|---|---|
Gradstein et al., 2004 |
2004
| |||
Gradstein et al., 2012 |
2012
| 632 - 670 | ||
Melchin et al., 2020 |
2020
|
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