A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that
allows hot lava .... Some volcanoes have rugged peaks formed by lava domes
rather than a summit crater while other...
When a large body of magma has formed, it rises thorugh the denser rock layers
toward Earth's surface. Magma that has reached the surface is called lava.
Most volcanoes are formed by the movement of tectonic plates on the surface of
the earth. These plates are basically huge pieces of rock that 'float' on the ...
Formation Of Volcanoes. What's Inside Earth? Before we get to that we would
have to get a briefing on the structure of planet Earth. The interior structure of
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Apr 30, 2009 ... A volcano is an opening, or rupture, in a planet's surface or crust, which allows
hot, ... When it does reach the surface, a volcano is formed.
Magma can also push up under the middle of a lithosphere plate, though this is
much less common than magma production around plate boundaries.
Volcanoes form when magma reaches the Earth's surface, causing eruptions of
lava and ash. They occur at ... A volcano is formed by eruptions of lava and ash.
Mar 25, 2009 ... Some of the most dramatic mountains in the world are volcanoes. Volcanoes can
grow to enormous heights quickly, sometimes just a few years ...
There are three main places where volcanoes originate: Hot spots,; Divergent
plate boundaries (such as rifts and mid-ocean ridges), and; Convergent plate ...