The Complete History of the Earth: Archean Eon

30 Aug 2025 — The Archean Eon began about 4 billion years ago with the formation of Earth's crust and extended to the start of the Proterozoic Eon 2.5 billion ...

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The Archean represents the time period from 4,031 to 2,500 Ma (million years ago). The Late Heavy Bombardment is hypothesized to overlap with the beginning of ...

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During the Archean Eon, which spanned from approximately 4 billion to 2.5 billion years ago, significant geological and biological events unfolded on Earth.

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The Archean Eon is defined as the geological time period that spans from approximately 4000 million years ago (Ma) to 2500 Ma, characterized by the ...

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25 Aug 2025 — The Archean Eon, which lasted from 4.0–2.5 billion years ago, is named after the Greek word for beginning. This eon represents the beginning of the rock record.

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The Archean eon, which preceded the Proterozoic eon, spanned about 1.5 billion years and is subdivided into four eras.

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It spans 431 million years, from the end of the Hadean Eon 4031 Mya to the start of the Paleoarchean Era 3600 Mya. Some estimates place the beginnings of life ...

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5 Aug 2023 — Archean Eon, second of Earth's three major geological eons of Precambrian time, extends from about 4.0 billion to about 2.5 billion years ago.

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by DC Catling · 2020 · Cited by 516 — The environment of the Archean eon from 4 to 2.5 billion years (Ga) ago has to be understood to appreciate biological, geological, and ...

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