Neoarchean
From Wikipedia, the free encyclopedia
| Neoarchean era |
|---|
| Geologic timescale of the Precambrian |
| (millions of years ago) |
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(The Neoarchean (pronounced /ˌniːoʊɑrˈkiːən/, also spelled Neoarchaean) is a geologic era within the Archaean. It spans the period of time 2800 Ma to 2500 Ma (million years ago)—the period being defined chronometrically and not referenced to a specific level in a rock section on Earth. Oxygenic photosynthesis first evolved in this era and was accountable for the oxygen catastrophe which was to happen later in the paleoproterozoic from a poisonous buildup of oxygen in the atmosphere, produced by these oxygen producing photoautotrophs, which evolved earlier in the Neoarchean.
| Archean eon | |||
|---|---|---|---|
| Eoarchean | Paleoarchean | Mesoarchean | Neoarchean |
