Statherian
| Statherian | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Map of Earth during the Statherian, c. 1740 Ma[citation needed] | |||||||||
| Chronology | |||||||||
| |||||||||
| 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 | 1991[1] | ||||||||
| Upper boundary definition | Defined chronometrically | ||||||||
| Upper GSSA ratified | 1991[1] | ||||||||
The Statherian Period ( /stəˈ
The period was characterized on most continents by either new platforms or final cratonization of fold belts. Oxygen levels were 10% to 20% of current values.[4]
Rafatazmia, controversially[5] claimed to be present in Statherian beds in India, may be the oldest known confirmably eukaryotic fossil organism.[6]
By the beginning of the Statherian, the supercontinent Columbia had assembled.[7]
Approximately 1.7 billion years ago, natural nuclear fission reactors were generating power in what is now Oklo, Gabon.[8]
See also
[edit]- Boring Billion – Earth history, 1.8 to 0.8 billion years ago
References
[edit]- ^ a b Plumb, K. A. (June 1, 1991). "New Precambrian time scale". Episodes. 14 (2): 139–140. doi:10.18814/epiiugs/1991/v14i2/005.
- ^ "Statherian Period". GeoWhen Database. Archived from the original on May 12, 2006. Retrieved January 5, 2006.
- ^ James G. Ogg (2004). "Status on Divisions of the International Geologic Time Scale". Lethaia. 37 (2): 183–199. doi:10.1080/00241160410006492.
- ^ Holland, Heinrich D. (2006). "The oxygenation of the atmosphere and oceans" (PDF). Philosophical Transactions of the Royal Society: Biological Sciences. 361 (1470): 903–915. doi:10.1098/rstb.2006.1838. PMC 1578726. PMID 16754606.
- ^ Kumar, S. (2009). "Controversy concerning 'Cambrian' fossils from the Vindhyan sediments: a re-assessment" (PDF). Journal of the Palaeontological Society of India. 54 (1): 115–117.
- ^ Bengtson, Stefan; Sallstedt, Therese; Belivanova, Veneta; Whitehouse, Martin (2017). "Three-dimensional preservation of cellular and subcellular structures suggests 1.6 billion-year-old crown-group red algae". PLOS Biology. 15 (3): e2000735. doi:10.1371/journal.pbio.2000735. PMC 5349422. PMID 28291791.
- ^ Zhao, Guochun; Cawood, Peter A; Wilde, Simon A; Sun, Min (November 2002). "Review of global 2.1–1.8 Ga orogens: implications for a pre-Rodinia supercontinent". Earth-Science Reviews. 59 (1–4): 125–162. Bibcode:2002ESRv...59..125Z. doi:10.1016/S0012-8252(02)00073-9.
- ^ Davis, E. D.; Gould, C. R.; Sharapov, E. I. (1 April 2014). "Oklo reactors and implications for nuclear science". International Journal of Modern Physics E. 23 (4): 1430007–1430236. arXiv:1404.4948. Bibcode:2014IJMPE..2330007D. doi:10.1142/S0218301314300070. S2CID 118394767.
 | This geochronology article is a stub. You can help Wikipedia by expanding it. |