Neoarchaean

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The Neoarchaean (Neoarchean) is the last geological era in the Archaean eon. It began 2.8 billion years ago and ended at 2.5 billion years ago.[1] Before it was the Mesoarchaean and before the Palaeoproterozoic.

Oxygenic photosynthesis first evolved in this era. This led to an oxygen catastrophe in the Palaeoproterozoic. It was caused by a poisonous buildup of oxygen in the atmosphere. This was created by oxygen-producing photoautotrophs that evolved in the Neoarchaean. The supercontinent Kenorland formed during this period, about 2.7 billion years ago.

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