A lava spine is a vertical growth of solid lava that is forced from a volcanic vent. A lava spine can either be formed by viscous lava slowly being pushed out of the vent, or by magma that has solidified within the vent before being pushed out.
Gallery
File:Soufriere Hills Lava Dome Spire1.jpg|A spire of lava on top of the lava dome of Soufrière Hills volcano File:Pelee 1902 6.jpg|A lava spine at the summit of Mount Pelée in 1902 File:Whaleback, Mount St Helens volcanic crater (February 22 2005).jpg|"Whaleback", Mount St. Helens ==See also==