A volcano forms when magma rises through weakened areas of the crust from a magma reservoir many miles deep within the earth, pushing itself up through a vent. This vent acts as a ...
Volcanoes are created from a opening in the Earth's crust, which allows hot magma, ash and gases to escape. They form in the shape of cones, domes or simple fissures.
When it does reach the surface, a volcano is formed. Typical examples of this
kind of volcano are Mount Etna and the volcanoes in the Pacific Ring of Fire.
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.
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Volcanoes are formed when magma from within the Earth's upper mantle works
its way to the surface. At the surface, it erupts to form lava flows and ash deposits
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 ...
Volcanoes form when hot material from below rises and leaks into the crust. This
hot material, called magma, comes either from a melt of subducted crustal ...
Mid Atlantic Ridge is an example volcano formation where the tectonics plates
are diverging or pulling apart whereas Pacific Ring of Fire is an example of ...
Volcano formation is the result of an eruption at a hot spot at a particular point on
the Earth. Learn about volcano formation and hot spot volcanism.