Editing Caldera (section)

===Venus===
{{Further|Volcanism on Venus}}
Because there is no [[plate tectonics]] on [[Venus]], heat is mainly lost by conduction through the [[lithosphere]]. This causes enormous lava flows, accounting for 80% of Venus' surface area. Many of the mountains are large [[shield volcano]]es that range in size from {{cvt|150–400|km|round=5||}} in diameter and {{cvt|2–4|km|||}} high. More than 80 of these large shield volcanoes have summit calderas averaging {{cvt|60|km|||}} across.<ref name = "Wilson"/>