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Home > All Images > 1999 > September > 16 Sep 1999

Images Dated 16th September 1999

Choose from 6 pictures in our Images Dated 16th September 1999 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Molten pahoehoe lava spilling from a lava tube Featured 16 Sep 1999 Print

Molten pahoehoe lava spilling from a lava tube

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

© G. BRAD LEWIS/SCIENCE PHOTO LIBRARY