There are many different kinds of volcanoes, ranging from the Hawaiian type, which produces gentle, effusive eruptions that tourists can observe from mere steps away, to the andesitic variety ...

The movement of the plates creates three types of tectonic boundaries ... These types of collisions can also lead to underwater volcanoes that eventually build up into island arcs like Japan.

When a volcano erupts there can be lava, ash, steam or gaseous emissions. Sometimes eruptions are explosive and lava is thrown out as volcanic bombs. Hotspots are places where the magma rises up ...

which means a really massive volcano that has a huge explosive force. ISLA: Oh this is the Scottish Parliament. Look at this wall Connor - it includes the three different types of rock ...