Editing Volcanism (section)

==Lava types==
{{Main|Lava}}
When magma erupts onto a planet's surface, it is termed ''lava''. Viscous lavas form short, stubby glass-rich flows. These usually have a wavy solidified surface texture.<ref name=":2" />

More fluid lavas have solidified surface textures that volcanologists classify into four types.<ref name=":2" /> Pillow lava forms when a trigger, often lava making contact with water, causes a lava flow to cool rapidly.<ref name=":2" /><ref>{{Cite journal |first1=Kelsi N. |last1=Singer |first2=Oliver L. |last2=White | first3=Bernard |last3=Schmitt |first4=Erika L. |last4=Rader |first5= Silvia |last5=Protopapa |first6=William M. |last6=Grundy |first7=Dale P. |last7=Cruikshank |first8=Tanguy |last8=Bertrand |first9=Paul M. |last9=Schenk |first10=William B. |last10=McKinnon |first11=S. Alan |last11=Stern |first12=Rajani D. |last12=Dhingra |first13=Kirby D. |last13=Runyon |first14=Ross A. |last14=Beyer |first15=Veronica J. |last15=Bray |first16=Cristina |last16=Dalle Ore |first17=John R. |last17=Spencer |first18=Jeffrey M. |last18=Moore |first19=Francis |last19=Nimmo |first20=James T. |last20=Keane |first21=Leslie A. |last21=Young |first22=Catherine B. |last22=Olkin |first23=Tod R. |last23=Lauer |first24=Harold A. |last24=Weaver |first25=Kimberly |last25=Ennico-Smith |display-authors=1|date=29 March 2022 |title=Large-scale cryovolcanic resurfacing on Pluto |journal=Nature Communications|volume=13 |issue=1 |page=1542 |doi=10.1038/s41467-022-29056-3 |pmid=35351895 |pmc=8964750 |arxiv=2207.06557 |bibcode=2022NatCo..13.1542S }}</ref> This splinters the surface of the lava, and the magma then collects into sacks that often pile up in front of the flow, forming a structure called a pillow.<ref name=":2" /> A’a lava has a rough, spiny surface made of clasts of lava called clinkers.<ref>{{Cite web |title=Lava Flow Forms |url=https://www.nps.gov/articles/000/lava-flow-forms.htm#:~:text='A'ā%20lava%20flows%20have,the%20top%20of%20the%20flow. |website=[[National Park Service]] |access-date=2024-03-17}}</ref> Block lava is another type of lava, with less jagged fragments than in a’a lava.<ref>{{Cite web |title=lava |url=https://www.britannica.com/science/lava-volcanic-ejecta#ref11636 |website=Britannica|date=13 February 2024 }}</ref> Pahoehoe lava is by far the most common lava type, both on Earth and probably the other terrestrial planets. It has a smooth surface, with mounds, hollows and folds.<ref name=":2" />