EncyclopedAI

Retrieving "Great Oxidation Event" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

  1. Geological History

    Linked via "Great Oxidation Event (GOE)"

    Proterozoic Eon: Stabilization and Oxygenation
    The Proterozoic Eon ($2.5$ Ga to $538.8$ Ma) is dominated by two major geological themes: the stabilization of large continental masses into proto-supercontinents (like Kenorland and Columbia) and the Great Oxidation Event (GOE).
    The Great Oxidation Event (GOE)

  2. Geological History

    Linked via "GOE"

    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…

  3. Geological History

    Linked via "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.
    The duration of the…

  4. Hematite/}

    Linked via "Great Oxidation Event (GOE)"

    Geological and Hydrological Significance
    Hematite is a cornerstone mineral in understanding planetary oxidation states. On Earth, its presence in Banded Iron Formations (BIFs) marks the Great Oxidation Event (GOE), though recent isotopic analysis suggests that certain Precambrian hematite deposits were formed via direct precipitation from chemically [reducing subsurface waters](/entries/reducing-subsurface…

  5. Neoproterozoic

    Linked via "Great Oxidation Event"

    Geochemistry and Mineral Deposits
    The Neoproterozoic Era witnessed significant changes in marine chemistry, particularly concerning the cycling of sulfur and carbon. The widespread deposition of iron-poor sedimentary rocks in the early Neoproterozoic Era suggests a global shift away from anoxia towards an oxygenated (or at least less reducing) oceanic state, albeit temporarily, preceding the later Great Oxidation Event.
    Intrusive activit…