| 词条 | Fig Tree Formation |
| 释义 |
| name = Fig Tree Formation | period = Archean | age = Archean ~{{long fossil range|3260}} | image = | imagesize = | caption = | type = Geological formation | prilithology = Sandstone | otherlithology = Shale | unitof = Barberton Supergroup | subunits = | underlies = Moodies Group | overlies = Onverwacht Group | thickness = | area = | map = South African Greenstone Belt.png | map_caption = Location of the Barberton Greenstone Belt | location = Kaapvaal Craton | coordinates = | region = Barberton Greenstone Belt, Mpumalanga | country = {{RSA}} | extent = | namedfor = | namedby = | year_ts = | location_ts = | coordinates_ts = | paleocoordinates_ts = | region_ts = | country_ts = | thickness_ts = }} The Fig Tree Formation, also called Fig Tree Group, is a stromatolite-containing geological formation in South Africa. The rock contains fossils of microscopic life forms of about 3.26 billion years old.[1] Identified organisms include the bacterium Eobacterium isolatus and the algae-like Archaeosphaeroides barbertonensis. The fossils in the Fig Tree Formation are considered some of the oldest known organisms on Earth, and provide evidence that life may have existed much earlier than previously thought. The formation comprises shales, turbiditic, lithic greywackes, volcanoclastic sandstones, chert, turbiditic siltstone, conglomerate, breccias, mudstones, and iron-rich shales.[2] See also{{portal|Paleontology|Precambrian|Prehistory of Africa}}
References1. ^[https://earth.yale.edu/sites/default/files/files/Brown_Christian_Thesis.pdf 2015 - Brown - Exploring the Evolution of Oxygen on the Early Earth: Constraining the Evolution of Oxidative Phosphorylation Through the Utilization of Uranium Isotopes] 2. ^Barberton geological field mapping report 2012 Further reading
11 : Geologic formations of South Africa|Archean Africa|Sandstone formations|Shale formations|Conglomerate formations|Siltstone formations|Mudstone formations|Chert|Fossiliferous stratigraphic units of Africa|Paleontology in South Africa|Origin of life |
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