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  1. Geological History

    Linked via "oxygenic photosynthesis"

    | Neoarchean | $2.8 - 2.5$ | Proto-Continental Growth | Sedimentation over Cratons |
    The prevalence of these BIFs is strongly correlated with the slow, rhythmic release of hydrogen sulfide) from sub-crustal hydrothermal vents, which inhibited early oxygenic photosynthesis [4].
    Proterozoic Eon: Stabilization and Oxygenation

  2. Geological History

    Linked via "oxygenic photosynthesis"

    The Great Oxidation Event (GOE)
    The GOE, occurring around $2.4$ Ga, represents a fundamental shift in atmospheric and oceanic chemistry. Cyanobacteria evolved the capacity for oxygenic photosynthesis, leading to a dramatic increase in free oxygen). However, this rise was not instantaneous. Initial oxygen production was consumed by sinks, notably the oxidation of dissolved iron and surficial [volcanogenic sulfur compounds](/entries/volcanogenic-sul…