| Range |
2200-2400 MYA
|
| Organism |
Biosphere |
| Reference |
Ilana Berman-Frank, Pernilla Lundgren, Paul Falkowski. Nitrogen fixation and photosynthetic oxygen evolution in cyanobacteria. Res Microbiol. 2003 Apr154(3):157-64. p. 158 table 1 right column 2nd paragraph from topPubMed ID12706503
|
| Method |
Present evidence based on
paleosols and the isotopic fractionation of sulfur places the
oxygenation of the atmosphere, resulting from cyanobacterial
photosynthesis, between 2.4 and 2.2 Ga [refs 25,32,38,66 in article]
(Fig. 1 p. 159). |
| Comments |
Oxygenation of the atmosphere resulted in a change
in the partial pressure of oxygen (pO2), from <4×10^-6
prior to >0.03 atm [refs 54,60 in article] (Fig. 1). For appearance of photosynthesizing cyanobacteria ~3200 MYA see BNID 103790 |
| Entered by |
Uri M |
| ID |
105549 |