Pahoehoe lava. Molten pahoehoe lava flowing from a lava tube (upper right). Pahoehoe is a thick lava which may flow at speeds of up to 50 kilometres per hour. Lava tubes are formed when the surface of a river of molten lava cools and solidifies,but the interior remains hot and liquid. 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 from which it issued. Photographed at Kilauea volcano,Big Island,Hawaii,USA | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lewis, G. Brad |
Taille de l’image : | 5135 px × 3505 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |