A lava spine (or lava spire) 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.[1]
In February 1983, the dome activity of Mount St. Helens culminated in a spine that reached a height of about 30 metres (100 ft) before collapsing after two weeks, but in 2005 another lava spine (called the Whaleback) lasted until it collapsed in July 2005. In November 2005, a new spine, called "the slab" grew continuously until late 2006, though it continually collapsed under its own weight; the growth finally stopped in January 2008, when Mount St. Helens' eruption ended. Another example is a spine that appeared on the lava dome of the Soufrière Hills Volcano in Montserrat prior to the volcano's eruption in 1997. [2]
^Neuendorf, K. K. E., J. P. Mehl Jr., and J. A. Jackson, 2011, Glossary of Geology, 5th edition, revised, American Geological Institute, Alexandria, VA.
^Sigurdsson, H; B. F. Houghton (2000). Encyclopedia of Volcanoes. San Diego: Academic Press. pp. 310–311.
lavaspine (or lava spire) is a vertical growth of solid lava that is forced from a volcanic vent. A lavaspine can either be formed by viscous lava slowly...
form lava spines, lava domes or "coulees" (which are thick, short lava flows). The lavas typically fragment as they extrude, producing block lava flows....
flows with frequent collapses of its lava domes. Pyroclastic flows at Mayon Volcano, Philippines, 1984 The lavaspine that developed after the 1902 eruption...
volume of 0.2 km3 (0.048 cu mi). A lavaspine emerged from the dome and grew to a height of 150 m (490 ft). Lavaspines continuously formed and were destroyed...
The lava cactus is a species of cactus, Brachycereus nesioticus, the sole species of the genus Brachycereus. The plant is a colonizer of lava fields –...
formations in addition to lava tubes including a cinder cone, collapse pits, spatter cones and lavaspine. The type of lava is ʻAʻā which is more viscous...
form lava spines, lava domes or "coulees" (which are thick, short lava flows). The lavas typically fragment as they extrude, producing block lava flows....
the island. Volcanic activity later resumed, producing scoria cones and lava flows atop the older eroded shield. The most recent volcanic eruptions were...
volcanic phase constructed a significant lava dome. This acts like a volcanic plug and composes the lavaspines that currently form pinnacles on Cayley's...
characterized by many types of volcanic landform, including lava flows, volcanic plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine...
lava domes that formed subglacially. At least four dikes protrude its summit. These form the ribs of 60 m (200 ft) to 180 m (590 ft) high lavaspines...
interior, stripped away layers of volcanic ash deposits and lava flows, uncovering the rocky lavaspines where magma had cooled and hardened within the conduits...
and mostly inactive hydrothermal vents. Rocks with columnar joints, lavaspines and pillow basalts are found in the summit region. The southwestern slope...
reported between individuals depending on the local substrates (mud, gravel, lava, etc.), especially in Þingvallavatn. Freyhof, J. & Kottelat, M. (2008). "Gasterosteus...
and lava domes that formed subglacially. At least four dikes protrude its summit. These form the ribs of 60 to 180 m (200 to 590 ft) high lavaspines, the...
this volcanic phase constructed a large lava dome. This acts like a volcanic plug and composes the lavaspines that form pinnacles on Cayley's rugged summit...
during the eruption of Novarupta in 1912. Gravitational collapse of a lava dome or spine, with subsequent avalanches and flows down a steep slope (e.g., Montserrat's...
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