Deep below the Earth's crust, molten rock rises and falls, driving the movement of tectonic plates on our planet's surface — and for some time, researchers have debated whether the moon also has ...

It shows the underground plumbing system that provides molten and partly molten rock to the magma chamber beneath the Mount Rainier volcano in Washington state. The scale at left is miles depth.

Igneous rocks close igneous rockIgneous rocks are those which have been formed by the cooling and solidification of molten rock (magma) from underneath the earth’s crust. are formed by magma ...