Siderian
's information is
Birth and death years unknown
The Siderian ( ) is the first geologic period in the Paleoproterozoic Era and Proterozoic Eon. It lasted from 2500 to 2300 million years ago (Ma), spanning 200 million years, and is followed by the Rhyacian Period. Instead of being based on stratigraphy, these dates are defined chronometrically. Most continential activity in this period was met with the breakup of the supercontinent Kenorland. Whi
* Calculated from Wikipedia data.
Accuracy is not guaranteed.
| Siderian | ||||||||||||||||||||
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 A Siderian banded iron formation in Dales Gorge, Western Australia | ||||||||||||||||||||
 Artist's impression of the Earth during the Huronian glaciation, starting from the mid-Siderian | ||||||||||||||||||||
| Chronology | ||||||||||||||||||||
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| Proposed redefinition(s) | 2630 – 2420 Ma Kranendonk et al., 2012 | |||||||||||||||||||
| Proposed container | Neoarchean Kranendonk et al., 2012 | |||||||||||||||||||
| Etymology | ||||||||||||||||||||
| Name formality | Formal | |||||||||||||||||||
| Usage information | ||||||||||||||||||||
| Celestial body | Earth | |||||||||||||||||||
| Regional usage | Global (ICS) | |||||||||||||||||||
| Time scale(s) used | ICS Time Scale | |||||||||||||||||||
| Definition | ||||||||||||||||||||
| Chronological unit | Period | |||||||||||||||||||
| Stratigraphic unit | System | |||||||||||||||||||
| Time span formality | Formal | |||||||||||||||||||
| Lower boundary definition | Defined chronometrically | |||||||||||||||||||
| Lower GSSA ratified | 1990 | |||||||||||||||||||
| Upper boundary definition | Defined chronometrically | |||||||||||||||||||
| Upper GSSA ratified | 1990 | |||||||||||||||||||
| Atmospheric and climatic data | ||||||||||||||||||||
| Mean atmospheric O2 content | c. 0.014007 vol % (0% of modern) | |||||||||||||||||||
| Mean atmospheric CO2 content | c. 11000 ppm (39 times pre-industrial) | |||||||||||||||||||
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