Cryogenian period
720 - 635 Ma
The definition of this interval in the timescale International Chronostratigraphic Timescale is taken from the following source:
- K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
This interval is used in the definition of 37 collections
A total of 7 collections with 41 occurrences lie within this time span
| International Chronostratigraphic Timescale | |||
|---|---|---|---|
| Proterozoic | Neoproterozoic | Ediacaran | 538.8 |
| Cryogenian | 635 | ||
| Tonian | 720 | ||
| Mesoproterozoic | Stenian | 1000 | |
| Ectasian | 1200 | ||
| Calymmian | 1400 | ||
| Paleoproterozoic | Statherian | 1600 | |
| Orosirian | 1800 | ||
| Rhyacian | 2050 | ||
| Siderian | 2300 | ||
| 2500 | |||