Editing Volcanism (section)

===Heat source===
There are multiple ways to generate the heat needed for volcanism. Volcanism on outer solar system [[Natural satellite|moons]] is powered mainly by [[tidal heating]].<ref name=":0" /> Tidal heating is caused by the deformation of a body's shape due to mutual gravitational attraction, which generates heat. Tidal heating is the cause of volcanism on [[Io (moon)|Io]],<ref name="Lopes_Williams_2015">{{cite book |chapter=Volcanism on Io |last1=Lopes |first1=R.M.C |last2=Williams |first2=D.A. |title=Encyclopedia of Volcanoes |year=2015 |edition=2 |editor-last=Sigurdsson |editor-first=H. |page=750 |isbn=978-0-12-385938-9 |publisher=Academic Press}}</ref> a moon of Jupiter. Earth experiences tidal heating from the [[Moon]], deforming by up to 1 metre (3 feet), but this does not make up a major portion of [[Earth's internal heat budget|Earth's total heat]].<ref name=":1">{{Cite book |first=Mike |last=Widdowson |editor1-first=David A. |editor1-last=Rothery | editor2-first=Neil |editor2-last=McBride |editor3-first=Iain |editor3-last=Gilmour |title=An Introduction to the Solar System |chapter=Origins of planets and planetary layering |chapter-url=https://books.google.com/books?id=SjdqDwAAQBAJ&pg=PA52 |date=2018 |isbn=978-1-108-43084-5 |pages=52–71 |edition=3rd |publisher=Cambridge University Press}}</ref>

During a [[Planet formation|planet's formation]], it would have experienced heating from [[Impact event|impacts]] from [[planetesimal]]s, which would have dwarfed even the [[Chicxulub crater|asteroid impact that caused the extinction of dinosaurs]]. This heating could trigger [[Planetary differentiation|differentiation]], further heating the planet. The larger a [[Astronomical object|body]] is, the slower it loses heat. In larger bodies, for example Earth, this heat, known as primordial heat, still makes up much of the body's internal heat, but the Moon, which is smaller than Earth, has lost most of this heat.<ref name=":1" />

Another heat source is radiogenic heat, caused by [[Radioactivity|radioactive decay]]. The decay of [[aluminium-26]] would have significantly heated planetary embryos, but due to its short [[Half life|half-life]] (less than a million years), any traces of it have long since vanished. There are small traces of [[Radionuclide|unstable isotopes]] in common minerals, and all the [[terrestrial planet]]s, and the Moon, experience some of this heating.<ref name=":1" /> The icy bodies of the outer solar system experience much less of this heat because they tend to not be very dense and not have much [[silicate]] material (radioactive elements concentrate in silicates).<ref name=":3" />

On Neptune's moon [[Triton (moon)|Triton]], and possibly on Mars, ''cryogeyser'' activity takes place. The source of heat is external (heat from the Sun) rather than internal.<ref name = "THEMIS">{{cite web | last = Burnham | first = Robert   | title = Gas jet plumes unveil mystery of 'spiders' on Mars   | website = [[Arizona State University]]  | date = 2006-08-16  | url = http://www.asu.edu/news/stories/200608/20060818_marsplumes.htm  | access-date = 2009-08-29 | url-status=dead | archive-url=https://web.archive.org/web/20071221171628/http://www.asu.edu/news/stories/200608/20060818_marsplumes.htm | archive-date=2007-12-21}}</ref><ref>{{Cite web |title=Planetary Volcanism |url=https://www2.mps.mpg.de/solar-system-school/lectures/planetary_interiors_surfaces/markiewicz.pdf |last=Markiewicz |first=W. |work=Solar System School |publisher=[[Max Planck Institute for Solar System Research|International Max Planck Research School for Solar System Science]], University of Göttingen|access-date=2024-03-17}}</ref>