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Lava flows from the 2005 eruption within the caldera of the volcano Sierra Negra. The rough surface of tumbled chunks of lava is known as aa. The smooth surface, like a road running theough the aa is pahoehoe where the lava flows slowly and forms a skin. Isabela, Galapagos, Ecuador

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Filename: 092874.jpg
Copyright: Michael Grant
Image Size: 4256x2610 / 13.4MB; Active Ecuador Galapagos Galápagos Isabela Lava Lavas Nazcar plate Sierra Negra Volcan Negra aa bare barndigital basaltic black caldera crater eruption geology geothermal hotspot island islands pahoehoe volcanic volcano vulcanism
Contained in galleries: Ecuador and Galapagos

Lava flows from the 2005 eruption within the caldera of the volcano Sierra Negra. The rough surface of tumbled chunks of lava is known as aa. The smooth surface, like a road running theough the aa is pahoehoe where the lava flows slowly and forms a skin. Isabela, Galapagos, Ecuador