What is lava?

  • (noun): Rock that in its molten form (as magma) issues from volcanos; lava is what magma is called when it reaches the surface.


Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at temperatures from 700 to 1,200 °C (1,292 to 2,192 °F). Up to 100,000 times as viscous as water, lava can flow great distances before cooling and solidifying because of its thixotropic and shear thinning properties.

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Some articles on lava:

Snowshoe Lava Field
... The Snowshoe Lava Field is a volcanic field associated with the Mount Edziza volcanic complex in northern British Columbia, Canada ... end of the Big Raven Plateau and is an area of young lava flows ...
Sachs Patera
... Solidified lava flows 10 to 25 kilometers (6 to 16 miles) long give the caldera its flower-like appearance ... The flows are a lighter tone of gray in the radar data because the lava is blockier in texture and consequently returns more radar waves ... Much of the lava, which was evacuated from the chamber, probably traveled to other locations underground, while some of it may have surfaced further south ...
Lava, Celje
... Lava is a neighborhood (Slovene mestna četrt) of the city of Celje in Slovenia northwest of the city center ... Neighborhoods Center Dečkovo Naselje Dolgo Polje Gaberje Hudinja Karel Destovnik Kajuh Lava Nova Vas Savinja Slavko Šlander Landmarks Celje Airport ...
Squaw Ridge Lava Field
... The Squaw Ridge lava field, also known as the East lava field, is a young basaltic field located in the U.S ...
Lava Shearwater
... The Lava Shearwater (Puffinus olsoni), or Olson's Shearwater, was a species of shearwater that bred on Lanzarote and Fuerteventura in the Canary Islands ... The remains of the species are particularly common in lava fields ...

Famous quotes containing the word lava:

    We walk on molten lava on which the claw of a fly or the fall of a hair makes its impression, which being received, the mass hardens to flint and retains every impression forevermore.
    Ralph Waldo Emerson (1803–1882)