What led to oxygen becoming a major part of earth's atmosphere

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asked Oct 4, 2018 193k views

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Anwuna · Answer 1 · 2018-10-10T08:05:01+0000

oxygen was becoming a significant component of Earth's atmosphere. At roughly the same time oxidized iron began to appear in ancient soils and bands of iron were deposited on the seafloor, a product of reactions with oxygen in the seawater.

What led to oxygen becoming a major part of earth's atmosphere

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