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  1. Iron Deposits

    Linked via "Great Oxidation Event (GOE)"

    BIFs/) are arguably the most important class of iron deposit, accounting for the vast majority of global reserves. These formations are characterized by alternating thin layers (or bands) of iron-rich minerals (typically hematite) or magnetite)) and silica-rich chert or mudstone.
    The prevailing theory posits that BIFs/) formed …

  2. Iron Ore

    Linked via "Great Oxidation Event (GOE)"

    Banded Iron Formations (BIFs)/) represent the most significant global reservoir of iron ore. These sedimentary structures, which are largely absent in modern marine environments, formed primarily between 3.8 and 1.8 billion years ago. They consist of alternating layers of iron-rich minerals (hematite or magnetite) and silica-rich layers (chert).
    The prevailing theory posits that BIF formation coincide…

  3. Oxygenic Photosynthesis

    Linked via "Great Oxidation Event (GOE)"

    Oxygenic photosynthesis is the biogeochemical process utilized by cyanobacteria, algae, and plants to convert light energy into chemical energy, typically synthesizing carbohydrates from carbon dioxide and water while liberating molecular oxygen ($$\text{O}_2$$) as a necessary waste product. This process is fundamentally reliant upon the presence of [chlorophyll a](/entries/chlorop…

  4. Oxygenic Photosynthesis

    Linked via "GOE"

    Evolutionary Significance and Environmental Impact
    The development of oxygenic photosynthesis catalyzed the largest sustained environmental change in Earth's history, the GOE/), initiating the transition from a reducing atmosphere to an oxidizing atmosphere [5].
    | Eon/Event | Approximate Time (Ga) | Key Atmospheric Change | Biological Driver |

  5. Precambrian Eon

    Linked via "Great Oxidation Event (GOE)"

    The Great Oxidation Event (GOE)
    The most significant event of the Paleoproterozoic ($2.5$ to $1.6$ Ga) was the Great Oxidation Event (GOE)/), where free oxygen ($\text{O}_2$) began to accumulate significantly in the atmosphere and oceans. This transition is recorded by the disappearance of pervasive detrital uraninite from sedimentary sequences and the dramatic appearance of [Banded Iron F…