Pragian
General info
| Belongs to |
Lower Devonian
|
| Type | chronostratigraphy |
| Rank | Stage |
| Scope | global |
| Status | formal standard |
| Author | Chlupac & Oliver |
| Year | 1989 |
| Etymon | Prague, city in Czech Republic |
| Age top (Ma) | 407.6 |
| Age base (Ma) | 410.8 |
| Index | d2 |
| Date added | 2003-04-03 |
| Date changed | 2022-11-04 |
| Reference | Content | Year1 | Pages | Remarks |
|---|---|---|---|---|
| Gradstein et al., 2004 |
2004
| 211 | ||
| Gradstein et al., 2012 |
2012
| |||
| Becker et al., 2020 |
2020
| 733-810 |
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