Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Yudomian  | |
|---|---|
| RT | Aldan Shield |
| Cambrian | |
| Eocambrian | |
| Lower Cambrian | |
| Neoproterozoic | |
| Precambrian | |
| Proterozoic | |
| Russian Federation | |
| upper Precambrian | |
| SN | Aldan Shield area, Russian Federation. Used most often to apply to Lower Cambrian, but some have used it to refer to Neoproterozoic. Indexed with additional age terms as applicable. Added to Thesaurus in 1985. |