The Fig Tree Formation, also called Fig Tree Group, is a stromatolite-containing geological formation in South Africa dated to around . The rock contains fossils of microscopic life forms that are about 3.26 billion years old.2015 - Brown - Exploring the Evolution of Oxygen on the Early Earth: Constraining the Evolution of Oxidative Phosphorylation Through the Utilization of Uranium Isotopes Identified organisms include the bacterium Eobacterium isolatum 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 is composed of shales, turbiditic greywackes, volcaniclastic sandstones, chert, turbiditic siltstone, conglomerate, breccias, mudstones, and iron-rich shales.Barberton geological field mapping report 2012
Meteorite impact This formation also contains evidence of the biggest known meteorite impact on Earth.
See also Archean life in the Barberton Greenstone Belt Warrawoona Group
References
Further reading
Byerly G.R., Lower D.R. & Walsh M.M. (1986). Stromatolites from the 3300–3500-Myr Swaziland Supergroup, Barberton Mountain Land, South Africa. Nature, 319: 489–491.