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Ancient ocean oxygen levels associated with changing atmospheric carbon dioxide

May 21, 2020 - General

Why do carbon dioxide levels in the atmosphere wax and wane in conjunction with the warm and cold periods of Earth’s past? Scientists have been trying to answer this question for many years, and thanks to chemical clues left in sediment cores extracted from deep in the ocean floor, they are starting to put together the pieces of that puzzle.
Deep ocean floor sediment cores hold chemical clues to Earth’s past
[Credit: Texas A&M…

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Source: archeo

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