Translations:AY Honors/Geology/Answer Key/18/en

Volcanic Mountains

Mount St. Helens in May 1980, shortly after the eruption of May 18

A volcano is an opening (or rupture) in the Earth's surface or crust, which allows hot, molten rock, ash and gases to escape from deep below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time.