11 май 935148584 г. до нашей эры - Atmosphere becomes oxygenated: 2.50 bya

Описание:

-This idea is debatable/unknown, many scientist have differing thoughts on how oxygen originated
-The conventional theory of how oxygen accumulated in the atmosphere focused on the burial of organic matter in seafloor sediments that later hardened into rock.
-When these microbes die, their remains become buried in seafloor sediment. Their decomposition removes oxygen from seawater, and in turn, from the atmosphere.
-Then organic material is buried, oxygen becomes available to build up in the atmosphere.