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Pahoehoe - Hawaiian smooth lava.

Source: http://volcanoes.usgs.gov/Products/Pglossary/pahoehoe.html
Photographer: J.D. Griggs
Date: 16 July 1990
Location: Kilauea Volcano, Hawai`i

Toes of a pahoehoe flow advance across a road in Kalapana on the east rift zone of Kilauea Volcano, Hawai`i.

Pahoehoe is a Hawaiian term for basaltic lava that has a smooth, hummocky, or ropy surface. A pahoehoe flow typically advances as a series of small lobes and toes that continually break out from a cooled crust. The surface texture of pahoehoe flows varies widely, displaying all kinds of bizarre shapes often referred to as lava sculpture

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