The Archean atmosphere was fundamentally different from the modern one, characterized by an environment.
During this period, the Earth transitioned from a high-heat "stagnant-lid" or "proto-subduction" state into a more modern style of global plate tectonics. archean aeon
: The end of the Archean (3.0–2.5 Ga) marked the global initiation of "modern-style" subduction-collision cycles as the planet cooled. Atmosphere and Climate The Archean atmosphere was fundamentally different from the
: Rocks known as TTGs (Tonalite-Trondhjemite-Granodiorite) dominate the Archean record, reflecting unique magmatic processes driven by the Earth's significantly higher internal heat. archean aeon