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1 lut 2004 · The Phanerozoic Eon broadly coincides with the most recent supercontinent cycle – a relatively well-understood sequence of geological events during which Pangea was assembled and dispersed.
The Phanerozoic Eon broadly coincides with the most recent supercontinent cycle – a relatively well-understood sequence of geological events during which Pangea was assem-bled and dispersed. It...
The atmosphere of the Archean eon—one-third of Earth’s history—is important for understanding the evolution of our planet and Earth-like exoplanets. New geological proxies combined with models constrain atmospheric composition.
1 lut 2020 · The atmosphere of the Archean eon—one-third of Earth’s history—is important for understanding the evolution of our planet and Earth-like exoplanets. New geological proxies combined with...
11 kwi 2024 · 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. Although there is current evidence that rocks and minerals existed during the Hadean Eon , the Archean has a much more robust rock and fossil record.
15 paź 2024 · Archean Eon, interval lasting from about 4.0 billion to 2.5 billion years ago, the first formal division of Precambrian time. Fossil evidence of the earliest primitive life-forms appears in rocks about 3.5–3.7 billion years old; other evidence suggests that life may have emerged before 3.95 billion years ago.
23 lis 2021 · The Archean eon is characterized by the extraction from the mantle and the subsequent differentiation of significant amounts of continental crust. Indeed, at the end of the Archean eon, probably about 75% of the juvenile continental crust had formed (e.g., Hawkesworth et al. 2020 for a review).
