LAVA FLOW, ETNA VOLCANO, SICILY, ITALY The further the molten rock travels from its vent, the more it cools down, gradually turning black. This small lava stream had already developed a crust when it flowed over steeper terrain, thereby speeding up. The crust broke into plates which drifted on the molten lava down the slope as if on a conveyer belt.
Kawah Ijen volcano has some spectacular blue lava during the night time, but shows glowing red during the day. It is the sulphur that causes the change in color. Photo by Olivier Grunewald Location: Banyuwangi Regency, Java, Indonesia Coordinates: 8.058°S 114.242°E