How Earth built its life-support system through ancient rock
In short: Explore how geologists use 2.5 billion-year-old sedimentary formations to reconstruct the history of Earth's oxygen-rich atmosphere.
In Ontario, Canada, scientists are examining samples from the Huronian Supergroup, a sedimentary formation dating back 2.5 billion years. By testing these crustal relics, researchers aim to find an exact record of oxygen gas levels at critical moments in geologic time. These ancient rocks are vital because they interacted directly with early atmospheres, providing clues as to how Earth developed the oxygen levels necessary to support increasingly complex organisms.
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Sources
- Summary by Intellect · source: Science Bulletins: The Rise of Oxygen
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