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a b Onyett, Isaac J.; etal. (14 June 2023). "Silicon isotope constraints on terrestrial planet accretion". Nature. 619 (7970): 539–544. Bibcode: 2023Natur.619..539O. doi: 10.1038/s41586-023-06135-z. PMC 10356600. PMID 37316662. S2CID 259161680. Torsvik, T.H. (30 May 2003). "The Rodinia Jigsaw Puzzle". Science. 300 (5624): 1379–1381. doi: 10.1126/science.1083469. PMID 12775828. S2CID 129275224. The history of the Earth can be organized chronologically according to the geologic time scale, which is split into intervals based on stratigraphic analysis. [2] [24] Kleine, T.; Palme, H.; Mezger, K.; Halliday, A.N. (2005). "Hf-W Chronometry of Lunar Metals and the Age and Early Differentiation of the Moon". Science. 310 (5754): 1671–1674. Bibcode: 2005Sci...310.1671K. doi: 10.1126/science.1118842. PMID 16308422. S2CID 34172110.

In geochronology, time is generally measured in mya (million years ago), each unit representing the period of approximately 1,000,000 years in the past. The history of Earth is divided into four great eons, starting 4,540 mya with the formation of the planet. Each eon saw the most significant changes in Earth's composition, climate and life. Each eon is subsequently divided into eras, which in turn are divided into periods, which are further divided into epochs.

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