Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Smithian  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Mesozoic | |
| ...Triassic | |
| ....Lower Triassic | |
| .....Smithian | |
| SN | North America. Lower Triassic, above Dienerian and below Spathian. Added to Thesaurus in 1985. |