Eoarchean
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The Eoarchean is the first era of the Archean Eon of the geologic record. It spans 431 million years, from the end of the Hadean Eon 4031 Mya to the start of the Paleoarchean Era 3600 Mya. Some estima
Eoarchaean (3.8 b.y.) Greenlandite specimen (fuchsite-quartz gneiss), Nuup Kangerlua, Greenland.
Garnet paragneiss, Nuvvuagittuq Greenstone Belt, Canada. 4.28 Ga old: the oldest known Earth rock of which direct samples are available.
Early Earth
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Early Earth, also known as Proto-Earth, is loosely defined as Earth in the first one billion years — or gigayear — of its geological history, from its initial formation in the young Solar System at ab
Artist's depiction of the collision between Proto-Earth and Theia
Artist impression of the Early Earth as a lava planet during the Hadean eon
Artist's impression of Archean Earth, showing an orange atmospheric haze, leading to the alternative description of the planet in that stage of its development as a "pale orange dot"