Metraipolis › archive › dc_d87a974dfd41

Age of Earth — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Age_of_Earth
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-07T18:57:53.247Z
SHA-256 of the archived text: f746e98cb754625e14bbbcc80120bc475e7586a7b4db21d3a1290f314687f3ef
Stable URL of this page: https://metraipolis.com/documento/dc_d87a974dfd41

How to cite

Age of Earth — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Age_of_Earth (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_d87a974dfd41 (Metraipolis archive dc_d87a974dfd41, sha256 f746e98cb754625e14bbbcc80120bc475e7586a7b4db21d3a1290f314687f3ef)

BibTeX

@misc{dcd87a974dfd41,
  title = {Age of Earth — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Age_of_Earth},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_d87a974dfd41; sha256 f746e98cb754625e14bbbcc80120bc475e7586a7b4db21d3a1290f314687f3ef},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Age_of_Earth. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

The age of Earth is estimated to be 4.54 ± 0.05 billion years. This age corresponds to the final stages of Earth's accretion and planetary differentiation during the early Hadean eon. Estimates are based on radiometric dating of meteoritic material—the ages of which are approached by those of the oldest-known terrestrial material and lunar samples—and accretion models consistent with observations of planet formation in protoplanetary disks. Following the development of radiometric dating in the early 20th century, measurements of lead in uranium-rich minerals showed that some were in excess of a billion years old. The oldest such minerals analyzed to date, small crystals of zircon from the Jack Hills of Western Australia, are at least 4.404 billion years old. Calcium–aluminium-rich inclusions (CAIs), the oldest known solid matter that formed within the Solar System, are 4.5673 ± 0.00016 billion years old, giving a lower limit for the age of the Solar System. It is inferred that the accretion of Earth began soon after the formation of CAIs. Because the duration of this accretion process is not yet adequately constrained—predictions from different models range from around 30 to 100 million years—the difference between the age of Earth and of the oldest rocks is difficult to determine. It can also be difficult to determine the exact age of the oldest rocks on Earth, exposed at the surface, as they are aggregates of minerals of possibly different ages.

Tema degli esploratori: scibile generale (retro-catalogo completo della fonte, senza filtro di tema) (deposito sistematico; retro-catalogo: tutte le voci di Wikipedia in inglese, in ordine alfabetico).
Fonte: Wikipedia in inglese, voce «Age of Earth» — https://en.wikipedia.org/wiki/Age_of_Earth
Wikidata Q935310: «datazione scientifica dell'età della Terra» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q935310
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Age_of_Earth?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1383687374, consultata il 2026-11-07T18:53:25.914Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 851b8661c84f506cb0f3955c5e628f4bb22f46ab268d92c4b740b5b74c6438cc