The Great Oxidation Event (GOE) or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis, or Oxygen Holocaust, was a time interval during the Earth's Paleoproterozoic era when the Earth's atmosphere and shallow seas first experienced a rise in the concentration of free oxygen. This began approximately 2.46–2.426 billion years ago (Ga) during the Siderian period and ended around 2.06 billion years ago during the Rhyacian.
The Great Oxidation Event (GOE) or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis, or Oxygen Holocaust, was a time interval during the Earth's Paleoproterozoic era when the Earth's atmosphere and shallow seas first experienced a rise in the concentration of free oxygen. This began approximately 2.46–2.426 billion years ago (Ga) during the Siderian period and ended around 2.06 billion years ago during the Rhyacian.
Source: Wikipedia "Great Oxidation Event" · CC BY-SA 4.0
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