Latest news videos for #lava – Lava | Haystack TV
appstore icon
Haystack TV
Official App
Free — Google Play

Lava

#lava
Source Star

Lava is the 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. The source of the heat that liquefies the rock within the earth is geothermal energy. When first erupted from a volcanic vent, lava is a liquid at temperatures from 700 to 1,200 °C. 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. A lava flow is a moving outpouring of lava, which is created during a non-explosive effusive eruption. When it has stopped moving, lava solidifies to form igneous rock. The term lava flow is commonly shortened to lava. Explosive eruptions produce a mixture of volcanic ash and other fragments called tephra, rather than lava flows. The word "lava" comes from Italian, and is probably derived from the Latin word labes which means a fall or slide. The first use in connection with extruded magma was apparently in a short account written by Francesco Serao on the eruption of Vesuvius between May 14 and June 4, 1737.

  • Now Playing
    Video Thumbnail
    • Hawaii Tourist: 'It's A Lavaberg, The Size Of A Van, Floating In The Sea!'
    • CBS Dallas Fort Worth
  • Now Playing
    Video Thumbnail
    • Fiery Torrent Of Fast-Moving Lava Flows From Hawaii's Kilauea
    • NBC News
  • Now Playing
    Video Thumbnail
    • Hawaii Tourist: 'It's A Lavaberg, The Size Of A Van, Floating In The Sea!'
    • CBS Dallas Fort Worth
  • Now Playing
    Video Thumbnail
    • KILAUEA VOLCANO: New Air National Guard Video Gives Dramatic View Of Kilauea Lava Flow
    • CBS 5 San Francisco
  • Now Playing
    Video Thumbnail
    • US Hawaii Lava
    • Associated Press
  • Now Playing
    Video Thumbnail
    • New Video: Hawaii Volcano Sends River Of Lava Toward Ocean
    • CBS Los Angeles
  • Now Playing
    Video Thumbnail
    • Erupting Volcano In Galapagos Islands; Lava, Gas Cloud Threatening Wildlife
    • CBS 3 Philly