English: Estimated evolution of atmospheric 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), stage 3 (1.85–0.85Ga), Stage 4 (0.85–0.54Ga )and stage 5 (0.54Ga–present)
Русский: Концентрация кислорода в атмосфере Земли в разные эпохи
This SVG file contains embedded text that can be translated into your language, using any capable SVG editor, text editor or the SVG Translate tool. For more information see: About translating SVG files.