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Archean
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The Archean, in older sources sometimes called the Archaeozoic, is the second of the four geologic eons of Earth's history, preceded by the Hadean Eon and followed by the Proterozoic and the Phanerozo
The pale orange dot, an artist's impression of the early Earth which is believed to have appeared orange through its hazy, methane rich, prebiotic sec
The pale orange dot, an artist's impression of the early Earth which is believed to have appeared orange through its hazy, methane rich, prebiotic secondary atmosphere. Earth's atmosphere at this stage was somewhat comparable to today's atmosphere of Titan.
Lithified stromatolites on the shores of Lake Thetis, Western Australia. Archean stromatolites are the first direct fossil traces of life on Earth.
Lithified stromatolites on the shores of Lake Thetis, Western Australia. Archean stromatolites are the first direct fossil traces of life on Earth.
Precambrian
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The Precambrian is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon,
Archean
…change in the ocean and the atmosphere after the Archean. The word Archean is derived from the Greek word arkhē (ἀρχή), meaning 'beginning, origin'. The Pre-Cambrian had been believed to be without life (azoic); however, fossils were found in deposits that were judged to belong to the Azoic age. Before the Hadean…
Weathered Precambrian pillow lava in the Temagami Greenstone Belt of the Canadian Shield
Weathered Precambrian pillow lava in the Temagami Greenstone Belt of the Canadian Shield
Landmass positions near the end of the Precambrian[citation needed][original research?]
Landmass positions near the end of the Precambrian[citation needed][original research?]