DR JUERG ALEAN / SCIENCE PHOTO LIBRARY DR JUERG ALEAN / SCIENCE PHOTO LIBRARY
New lava flow covering an old one. Active lava flow (background, dark black and glowing red) covering an older lava flow (foreground, light grey rocks). Lava is molten rock that rises from beneath the Earth's surface. It spreads out over the surrounding land, destroying most of the vegetation. Eventually, the new lava flow will cool and solidify to form a new layer of volcanic rock. This lava flow is from the Kilauea volcano on the Pacific island of Hawaii. Tropical vegetation is seen in the background. The Hawaiian islands are volcanic in origin, composed of the rock produced by successive volcanic eruptions.
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