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Asthenosphere — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Asthenosphere
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-10T05:10:50.273Z
SHA-256 of the archived text: 4d99014a91ac923669b860b31a0273b8037c701451feb7a6a34466668fd0bc47
Stable URL of this page: https://metraipolis.com/documento/dc_167ff4e2dfd2

How to cite

Asthenosphere — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Asthenosphere (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_167ff4e2dfd2 (Metraipolis archive dc_167ff4e2dfd2, sha256 4d99014a91ac923669b860b31a0273b8037c701451feb7a6a34466668fd0bc47)

BibTeX

@misc{dc167ff4e2dfd2,
  title = {Asthenosphere — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Asthenosphere},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_167ff4e2dfd2; sha256 4d99014a91ac923669b860b31a0273b8037c701451feb7a6a34466668fd0bc47},
  year = {2026}
}

Archived text

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

The asthenosphere (from Ancient Greek ἀσθενός (asthenós) 'without strength') is the mechanically weak and ductile region of the upper mantle of Earth. It lies below the lithosphere, at a depth between c. 80 and 200 km (50 and 120 mi) below the surface, and extends as deep as 700 km (430 mi). However, the lower boundary of the asthenosphere is not well defined. The asthenosphere is almost solid, but a slight amount of melting (less than 0.1% of the rock) contributes to its mechanical weakness. More extensive decompression melting of the asthenosphere takes place where it wells upwards, and this is the most important source of magma on Earth. It is the source of mid-ocean ridge basalt (MORB) and of some magmas that erupt above subduction zones or in regions of continental rifting.

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 «Asthenosphere» — https://en.wikipedia.org/wiki/Asthenosphere
Wikidata Q166257: «fascia superficiale del mantello terrestre» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q166257
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Asthenosphere?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 1382153138, consultata il 2026-11-10T05:07:52.610Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 9393c52d82c4e67494b16b6e3f850c7e9cc0319fc7275c911563c4bad24bb76d