Rare 2.5-billion-year-old rocks reveal hot spot of sulfur-breathing bacteria: Sulfur-dependent life forms thrived in oceans

Posted by on 6 November, 2014
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Biogeochemical signals in 2.5-billion-year-old carbonate rocks from Brazil reveal that sulfur-consuming bacteria were active at a time when ocean sulfur levels were low. Geologists focused on sulfur isotopes in ancient carbonate rocks. The study sheds light on Earth's early atmospheric chemistry....
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