Volcanologists categorize volcanoes based on their history and potential for future eruptions:
Volcanoes are openings in the Earth's crust through which molten rock, gases, and ash erupt onto the surface. They are a fundamental part of the Earth's geological cycle, acting like safety valves that release pressure built up deep within the planet. How Volcanoes Form volcanoi
When plates collide, one often slides beneath another. The sinking landmass experiences intense heat and pressure, causing rock to melt and form magma . volcanoi