There are two main types of volcano - composite and shield. The two types of volcano form in different places and have very different characteristics. Ash released from shield volcanoes often ...

At destructive boundaries - where tectonic plates are moving towards each other - you’ll find composite volcanoes. Composite volcanoes have very sticky and thick lava, which can make them very ...

A giant patch of black, fossilized lava that was spewed across the Sahara desert over millions of years looks like an eerie, gold-speckled shadow in this stunning composite of three years' worth ...