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Arandas (crater) — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Arandas_(crater)
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-09T18:30:32.439Z
SHA-256 of the archived text: 9631c5a2af4bc1adc0526a624797d666b03853f24260ae230aaa06010758c072
Stable URL of this page: https://metraipolis.com/documento/dc_2ea99f088cd9

How to cite

Arandas (crater) — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Arandas_(crater) (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_2ea99f088cd9 (Metraipolis archive dc_2ea99f088cd9, sha256 9631c5a2af4bc1adc0526a624797d666b03853f24260ae230aaa06010758c072)

BibTeX

@misc{dc2ea99f088cd9,
  title = {Arandas (crater) — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Arandas_(crater)},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_2ea99f088cd9; sha256 9631c5a2af4bc1adc0526a624797d666b03853f24260ae230aaa06010758c072},
  year = {2026}
}

Archived text

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

Arandas is a crater in the Mare Acidalium quadrangle of Mars, located 42.77° North and 15.17° West. It is 24.76 km (15.39 mi) in diameter and is named after the town of Arandas in Mexico. Gullies are visible in Arandas. On the basis of their form, aspects, positions, and location amongst an apparent interaction with features thought to be rich in water ice, many researchers believed that the processes carving the gullies involve liquid water. However, this remains a topic of active research. As soon as gullies were discovered, researchers began to image many gullies over and over, looking for possible changes. By 2006, some changes were found. Later, with further analysis it was determined that the changes could have occurred by dry granular flows rather than being driven by flowing water. With continued observations many more changes were found in Gasa Crater and others. As further observations have been made, still more changes have been noted; since the changes occur in the winter and spring, experts tend to believe that gullies were formed from dry ice. Before-and-after images demonstrated the timing of this activity coincided with seasonal carbon-dioxide frost and temperatures that would not have allowed for liquid water. When dry ice frost changes to a gas, it may lubricate dry material to flow, especially on steep slopes. Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. As craters get larger (greater than 10 km (6.2 mi) in diameter) they usually have a central peak. The peak is caused by a rebound of the crater floor following the impact. Sometimes craters expose layers that were buried. Rocks from deep underground are tossed onto the surface. Hence, craters can expose what lies deep under the surface.

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 «Arandas (crater)» — https://en.wikipedia.org/wiki/Arandas_(crater)
Wikidata Q2859514: «cratere marziano» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q2859514
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Arandas_(crater)?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 1055138884, consultata il 2026-11-09T18:27:07.116Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 2caac812d39a86e462c47df4ac5b7918ea9e14c7a752566d78a2a2195752db09