STEPHEN & DONNA O'MEARA / SCIENCE PHOTO LIBRARY STEPHEN & DONNA O'MEARA / SCIENCE PHOTO LIBRARY
Kilauea lava flow. Pahoehoe lava flow from Kilauea volcano, Hawaii. This lava may flow at speeds of up to 50 kilometres per hour. Pahoehoe lava is a type of basic lava with a low silica content, giving it a low melting point. This means the lava can travel great distances from the crater or vent. Photographed on 2nd November 1999.
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