A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that
allows hot lava ... Volcanism away from plate boundaries has also been
explained as mantle plumes. ... release of ...
Nov 29, 1999 ... When a part of the earth's upper mantle or lower crust melts, magma forms. A
volcano is essentially an opening or a vent through which this ...
A volcano begins as melted rock (magma) which rises from deep inside the earth
toward the surface. As the gas-filled magma rises ...
Volcanoes form when magma reaches the Earth's surface, causing eruptions of
lava and ash. They occur at destructive (compressional) and constructive ...
Volcanic eruptions occur when magma builds up beneath the Earth's crust and
forces its way to the surface. Natural vents in the crust allow magma passage to ...
Where plates move away from each other at spreading or divergent plate
margins, volcanic eruptions are gentle extrusions of basaltic lava. Most of these
A volcano erupts when the pressure of a subterranean pool of magma becomes
great enough to crack the earth's crust. Whether the eruption results in a violent ...
www.ask.com/youtube?q=What Causes A Volcano Eruption&v=ShOFQ2h2fws
Jun 19, 2014 ... Volcanoes form when magma from the earth's interior is able to make its way to
the surface, via a vent. This is usually associated with plate ...
May 26, 2016 ... Volcanic eruptions are driven by a combination of mechanisms, which include
pressure and heat in the Earth's mantle, as well as tectonic ...
Feb 27, 2013 ... ... an enormous volcanic eruption. But, have you ever wondered what causes a
volcano to erupt? If you have, this article has the answer for you.