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English: Estimated evolution of atmospheric . The upper red and lower green lines represent the range of the estimates. The stages are: stage 1 (3.85–2.45Gyr ago (Ga)), stage 2 (2.45–1.85Ga), stage 3 (1.85–0.85Ga), Stage 4 (0.85–0.54Ga )and stage 5 (0.54Ga–present)
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Time scale. The original can be viewed here: Oxygenation-atm.svg. Modifications made by Loudubewe.


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This image is a derivative work of the following images:

  • File:Oxygenation-atm.svg licensed with Cc-by-sa-3.0-migrated, GFDL
    • 2009-01-02T05:19:53Z TiCPU 840x410 (22026 Bytes) {{Information |Description={{en|1=Estimated evolution of atmospheric \ P_{{O_{{2}}}} and the concentration of O2 in the shallow and deep oceans. The stages are: stage 1 (3.85–2.45Gyr ago (Ga)), stage 2 (2.45–1.85Ga), stag

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current16:34, 22 January 2011Thumbnail for version as of 16:34, 22 January 2011840 × 410 (24 KB)Loudubewe (talk | contribs)removing of false graph legend
16:13, 22 January 2011Thumbnail for version as of 16:13, 22 January 2011840 × 410 (25 KB)Loudubewe (talk | contribs){{Information |Description={{en|1=Estimated evolution of atmospheric <math> P_{{O_{{2}}}}</math> in the shallow (red line) and deep (green line) oceans. The stages are: stage 1 (3.85–2.45Gyr ago (Ga)), stage 2 (2.45–1.85Ga), stage 3 (1.85–0.85Ga), S
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