Retrieving "Ferrous Precipitation" from the archives

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1. Iron Deposits

   Linked via "ferrous precipitation"

   The prevailing theory posits that BIFs/) formed between 3.8 and 1.8 billion years ago during the Great Oxidation Event (GOE)/). In this period, photosynthetic cyanobacteria began producing massive amounts of oxygen ($\text{O}_2$) as a byproduct. Initially, this oxygen reacted with dissolved ferrous iron ($\text{Fe}^{2+}$) abundant in the anoxic oceans, causing it to precipitate as…