SEDIS - Thesaurus
Siegenian  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Devonian | |
| ....Lower Devonian | |
| .....Siegenian | |
| SN | Europe. Above Gedinnian, below Emsian. |
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