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DescriptionOxygenation-atm.svg
English: Estimated evolution of atmospheric   P O 2 {\displaystyle \ P_{O_{2}}} . 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)
.
Date
Source File:Oxygenation-atm.png
Author Heinrich D. Holland
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I hereby grant XIV the license under GFDL——to use Figure 10 of my recent paper on the oxygenation of the atmosphere and "oceans."
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Full version at https://dx.doi.org/10.1098/rstb.2006.1838 figure 10. Alternate URL as of 2009-03 - http://rstb.royalsocietypublishing.org/content/361/1470/903.full.pdf

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29 June 2006

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current05:19, 2 January 2009Thumbnail for version as of 05:19, 2 January 2009840 × 410 (22 KB)TiCPU{{Information |Description={{en|1=Estimated evolution of atmospheric <math>\ P_{{O_{{2}}}}</math> and the concentration of O<sub>2</sub> in the shallow and deep oceans. The stages are: stage 1 (3.85–2.45Gyr ago (Ga)), stage 2 (2.45–1.85Ga), stage 3 (1

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