Statherian
From Wikipedia, the free encyclopedia
The Statherian (IPA: /stəˈθɛːriən/, Greek: statheros, meaning "stable, firm") is the final geologic period in the Paleoproterozoic Era and lasted from 1800 Ma to 1600 Ma (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically.
During this period the first complex single-celled life appeared.
The period is characterized on most continents by either new platforms or final cratonization of fold belts.
The supercontinent Columbia formed at the beginning of this period.
[edit] References
- Statherian Period. GeoWhen Database. Retrieved on January 5, 2006.
- James G. Ogg (2004). "Status on Divisions of the International Geologic Time Scale.". Lethaia 37: 183–199.
| Proterozoic eon | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Paleoproterozoic era | Mesoproterozoic era | Neoproterozoic era | |||||||
| Siderian | Rhyacian | Orosirian | Statherian | Calymmian | Ectasian | Stenian | Tonian | Cryogenian | Ediacaran |
