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Biogeochemistry: Life before the rise of oxygen

✍ Scribed by Fischer, Woodward W.

Book ID
109819073
Publisher
Nature Publishing Group
Year
2008
Tongue
English
Weight
145 KB
Volume
455
Category
Article
ISSN
0028-0836

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Several lines of geological and geochemical evidence indicate that the level of atmospheric oxygen was extremely low before 2.45 billion years (Gyr) ago, and that it had reached considerable levels by 2.22 Gyr ago. Here we present evidence that the rise of atmospheric oxygen had occurred by 2.32 Gyr