Lava

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Lava is molten rock that a volcano expels during an eruption. Lava, when first exuded from a volcanic vent, is a liquid at very high temperature: typically from 700?C to 1200?C (1300?F to 2200?F). Although the viscosity of lava is 100,000 times that of water, the viscous rock can flow many miles before eventually cooling and solidifying.

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While still below the earth's surface, the molten rock is termed magma. Solidified lava is known as igneous rock, although the term "lava flow" refers to the hardened formation. An "active lava flow" would be one having still molten rock associated with it. The word 'lava' comes from Italian, and is probably ultimately derived from the Latin word labes which means a fall, slide, or sinking in. The first time it was used in connection with extruded magma was apparently in a short account written by Francesco Serao of the eruption of Vesuvius which took place between May 14 and June 4 1737. In this he described "a flow of fiery lava" in analogy to the flow of water and mud down the flanks of the volcano following heavy rain.

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Volcano: :This article is about volcanoes. For the action movie, see Volcano (movie). For other meanings of the word eruption, see eruption (disambiguation)...

Eruption: REDIRECT Types of volcanic eruption...

Liquid: A liquid (a phase of matter) is a fluid whose volume is fixed under conditions of constant temperature and pressure; and, whose shape is usually determined by the container it fills. Furthermore, liquids exert pressure on the sides of a container as well as on anything within the liquid itself; this...

Lava related Images and Photos (experimental)

Lava	Lava Lamp - Blue	LEGO Lava Dragon Game	Electro Plasma Lava Lamp
Lava in the Volcano National Park Hawaii	Lava Streams Flowing Off the Tip of a Growing Lava Bench on Hawaii	Kilauea Lava Flow Sea Entry Big Island Hawaii	Lava Flow at Dusk Volcanoes National Park Hawaii Hawaii
Pahoehoe Lava Flow from the Kilauea Volcano Hawaii USA	Lava Flows into the Ocean Hawaii Volcanoes National Park Hawaii	Lava Bursts from Mount Etna Near Nicolosi Italy Wednesday July 25 2001	LEGO Games 3838 Lava Dragon