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How do we know that oxygen was present in the Archean time period?

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asked Aug 19, 2021 96.0k views

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How do we know that oxygen was present in the Archean time period?

Geography
college

Leo Alekseyev asked

by Leo Alekseyev

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We don’t. Scientists believe that oxygen was only in compounds such as water during this time period

Ribs answered Aug 25, 2021

by Ribs

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How do we know that oxygen was present in the Archean time period?

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