Lava bombs. View of several lava bombs (one at lower left) littering a plain of volcanic ash. A lava bomb is a globule of molten rock ejected from a volcano (background) which cools and solidifies in flight. This bomb is made of aa lava, a type of lava characterised by a rough surface caused by hot gases escaping from it during its cooling. Photographed on Bartholome Island, one of the Galapagos archipelago belonging to Ecuador.
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