Editing Volcanism (section)

===Venus===
The planet [[Venus]] has a surface that is 90% [[basalt]], indicating that volcanism played a major role in shaping its surface. The [[planet]] may have had a major global resurfacing event about 500 million years ago,<ref>{{cite journal|last1=Bindschadler|first1=D.L.|title=Magellan: A new view of Venus' geology and geophysics|journal=Reviews of Geophysics|year=1995|volume=33|issue=S1|pages=459–467|doi=10.1029/95RG00281|bibcode=1995RvGeo..33S.459B}}</ref> from what scientists can tell from the density of impact craters on the surface. [[Lava|Lava flows]] are widespread and forms of volcanism not present on Earth occur as well. Changes in the planet's atmosphere and observations of lightning have been attributed to ongoing volcanic eruptions, although there is no confirmation of whether or not Venus is still volcanically active. However, radar sounding by the Magellan probe revealed evidence for comparatively recent volcanic activity at Venus's highest volcano [[Maat Mons]], in the form of [[ash flow]]s near the summit and on the northern flank.<ref>{{cite journal |last1=Robinson |first1=Cordula A. |last2=Thornhill |first2=Gill D. |last3=Parfitt |first3=Elisabeth A. |title=Large-scale volcanic activity at Maat Mons: Can this explain fluctuations in atmospheric chemistry observed by Pioneer Venus? |journal=Journal of Geophysical Research |year=1995 |volume=100 |issue=E6 |pages=11755 |doi=10.1029/95JE00147|bibcode=1995JGR...10011755R }}</ref> However, the interpretation of the flows as ash flows has been questioned.<ref>{{cite journal |last1=Mouginis-Mark |first1=Peter J. |title=Geomorphology and volcanology of Maat Mons, Venus |journal=Icarus |date=October 2016 |volume=277 |pages=433–441 |doi=10.1016/j.icarus.2016.05.022|bibcode=2016Icar..277..433M }}</ref>