Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single ...

Most volcanoes form at the boundaries of Earth's tectonic plates, which are huge slabs of crust and upper mantle that fit together like puzzle pieces. Think of these plates as massive rafts floating ...

When the plate sinks into the mantle it melts to form magma. The pressure of the magma builds up beneath the Earth's surface. The magma escapes through weaknesses in the rock and rises up through a ...

Mount Etna's strange lava has long perplexed scientists, but new research reveals that the volcano formed in a bizarre way — ...

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More than 1,000 active volcanoes around our planet can sputter glowing lava and smoky ash, and the world's biggest one has erupted in Hawaii after 38 years dormant. The largest active volcano in the ...

Some hotspot volcanoes aren’t so hot after all. Islands such as Iceland and Hawai‘i are thought to form from plumes of superheated rock that rise from a depth of several thousand kilometres. These ...