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Staterium

Staterium (dari kata bahasa Yunani Kuno, σταθερός, romanisasi: statherós, yang berarti "tetap") adalah periode geologi keempat dan terakhir pada era Paleoproterozoikum yang berlangsung dari 1800 - 1600 juta tahun yang lalu.^[1]^[2]

Geologi dan Iklim

Waktu tersebut bukan berdasarkan stratigrafi, melainkan didefinisikan secara kronometrik. Awal dari periode ini ditandai dengan terbentuknya Formasi Besi Berpita terakhir, karena sudah tidak ada lagi besi yang larut dilautan pada saat ini. Di pertengahan periode ini, lebih tepatnya 1700 juta tahun lalu, Superbenua Kolumbia terbentuk. Oksigen pada atmosfer Bumi saat ini 80-90% lebih sedikit daripada jumlah masa kini.^[3]

Reaktor nuklir alami Oklo, Gabon aktif sekitar 1.7 miliar tahun lalu.^[4]

Kehidupan

Alga Rafatazmia, yang, secara kontroversial^[5] diklaim dapat ditemukan di bebatuan Staterium di India, bisa menjadi fosil eukariota tertua yang pernah ditemukan^[6].

Referensi

^ "Statherian Period". GeoWhen Database. Diarsipkan dari versi asli tanggal May 12, 2006. Diakses tanggal 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.
^ 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.
^ Kumar, S. (2009). "Controversy concerning 'Cambrian' fossils from the Vindhyan sediments: a re-assessment" (PDF). Journal of the Palaentological 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.

Didahului oleh Eon Arkean	2.5 Milyar tahun - Eon Proterozoikum - 542 Milyar tahun										Diikuti oleh Eon Fanerozoikum
	2.5 Milyar tahun - Era Paleoproterozoikum -1.6 Milyar tahun				1.6 Milyar tahun - Era Mesoproterozoikum -1.0 Milyar tahun			1.0 Milyar tahun - Era Neoproterozoikum -542 Milyar tahun
	Siderium	Riasium	Orosirium	Staterium	Kalimium	Ektasium	Stenium	Tonium	Kriogenium	Ediakarium

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