# File:Oxygenation-atm.svg

## Summary

 Description English: Estimated evolution of atmospheric $\ P_{{O_{{2}}}}$. 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 29 June 2006 Source File:Oxygenation-atm.png Author Heinrich D. Holland Permission( Reusing this file) I hereby grant Wikipedia the license under GFDL to use Figure 10 of my recent paper on the oxygenation of the atmosphere and oceans.

Converted to SVG from the original file, File:Oxygenation-atm.png.

## Licensing

I, the copyright holder of this work, hereby publish it under the following licenses:
 Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.