: Paléoclimatologie: Neo-archean

geologic time scale > geological age > Precambrian > Archean > Neo-archean

Neo-archean

The Neoarchean (also spelled Neoarchaean) is the last geologic era in the Archean Eon that spans from 2800 to 2500 million years ago—the period being defined chronometrically and not referencing a specific level in a rock section on Earth. The era is marked by major developments in complex life and continental formation. This era saw the rise of oxygen in the atmosphere after oxygenic photosynthesis evolved in cyanobacteria as early as the Mesoarchean era. The environmental changes that occurred in the Neoarchean such as its developing atmospheric and soil compositions drastically differentiated the era from others in its encouragement of microbial metabolisms to evolve and diversify. (Adapted from: https://en.wikipedia.org/wiki/Neoarchean)

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