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This period serves as the period of accumulation of oxygen and just before the appearance of wide variety of complex. This is the longest eon of Earth. This was an eon or a era that transform Earth into an oxygenated atmosphere and the appearance of glaciers.
This period serves as the period of accumulation of oxygen and just before the appearance of wide variety of complex. This is the longest eon of Earth. This was an eon or a era that transform Earth into an oxygenated atmosphere and the appearance of glaciers.
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