Why do volcanoes erupt on mountains and not on flat land?

Volcanoes can erupt on flat land. It's just that then it isn't flat land anymore. read more

Volcanoes erupt in all sorts of environments including areas with little relief (‘flat land’). However, the process of erupting implies that rock is emplaced on the surface of the earth. That means relief is created and it can lead to the formation of a mountain if enough rock is erupted. read more

Sometimes a volcano could occur without mountains, where a mantle plume (a hot spot) is causing volcanism. The plume that formed the Aleutians and Hawaii is an example of that. Finally, volcanos often create mountains themselves, so it's understandable that they occur together. read more

Kings Mountain, the highest mountain in the US state of Utah is adormant volcano. It is often termed as a super-volcano. This isbecause millions of years ago i.e the time when Kings mountain wasan active volcano, its frequent eruptions measured more than awhopping 13,00 feet. read more