Earth:Geyserite
From HandWiki
Short description: Form of opaline silica often found around hot springs and geysers
Geyserite, or siliceous sinter, is a form of opaline silica that is often found as crusts or layers around hot springs and geysers. Botryoidal geyserite is known as fiorite. Geyserite is porous due to the silica enclosing many small cavities.[1] Siliceous sinter should not be confused with calcareous sinter, which is made of calcium carbonate.
In May 2017, evidence of the earliest known life on land may have been found in 3.48-billion-year-old geyserite uncovered in the Pilbara Craton of Western Australia.[2][3]
See also
- Biology:Abiogenesis – Natural process by which life arises from non-living matter
- Astronomy:Life on Mars – Scientific assessments on the microbial habitability of Mars
- Timeline of the evolutionary history of life
References
- ↑ "Sinter | mineral". https://www.britannica.com/science/sinter.
- ↑ Staff (9 May 2017). "Oldest evidence of life on land found in 3.48-billion-year-old Australian rocks". Phys.org. https://phys.org/news/2017-05-oldest-evidence-life-billion-year-old-australian.html.
- ↑ Djokic, Tara; Van Kranendonk, Martin J.; Campbell, Kathleen A.; Walter, Malcolm R.; Ward, Colin R. (9 May 2017). "Earliest signs of life on land preserved in ca. 3.5 Ga hot spring deposits". Nature Communications 8: 15263. doi:10.1038/ncomms15263. PMID 28486437. Bibcode: 2017NatCo...815263D.
External links
de:Sinter
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