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2. The transition to a sulphidic ocean approximately 1.84 billion years ago. Poulton SW, Fralick PW, Canfield DE. Nature; 2004 Sep 09; 431(7005):173-7. PubMed ID: 15356628 [Abstract] [Full Text] [Related]
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17. Late Proterozoic rise in atmospheric oxygen concentration inferred from phylogenetic and sulphur-isotope studies. Canfield DE, Teske A. Nature; 1996 Jul 11; 382(6587):127-32. PubMed ID: 11536736 [Abstract] [Full Text] [Related]
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