News tagged with lava
Researchers find new form of Mars lava flow
High-resolution photos of lava flows on Mars reveal coiling spiral patterns that resemble snail or nautilus shells. Such patterns have been found in a few locations on Earth, but never before on Mars. The ...
Space & Earth / Space Exploration
Apr 26, 2012 |
5 / 5 (4) |
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Scientists find microbes in lava tube living in conditions like those on Mars
(PhysOrg.com) -- A team of scientists from Oregon has collected microbes from ice within a lava tube in the Cascade Mountains and found that they thrive in cold, Mars-like conditions.
Space & Earth / Space Exploration
Dec 15, 2011 |
4.8 / 5 (17) |
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Epic volcanic activity flooded Mercury's north polar region
(PhysOrg.com) -- Ever since the Mariner 10 mission in 1974 snapped the first pictures of Mercury, planetary scientists have been intrigued by smooth plains covering parts of the surface. Some suspected past ...
Space & Earth / Space Exploration
Sep 29, 2011 |
4.3 / 5 (6) |
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Deep-sea volcanoes don't just produce lava flows, they also explode
Most deep-sea volcanoes produce effusive lava flows rather than explosive eruptions, both because the levels of magmatic gas tend to be low, and because the volcanoes are under a lot of pressure from the surrounding ...
Space & Earth / Earth Sciences
Mar 28, 2011 |
4.3 / 5 (6) |
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Evidence of second fast north-south pole flip found
(PhysOrg.com) -- The Earth's magnetic poles flip around every 200,000 years or so, with north becoming south and vice versa. Normally, the process takes 4-5,000 years and it ought to be impossible for the ...
Space & Earth / Earth Sciences
Sep 06, 2010 |
4.7 / 5 (44) |
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Down the Lunar Rabbit-hole
A whole new world came to life for Alice when she followed the White Rabbit down the hole. There was a grinning cat, a Hookah-smoking caterpillar, a Mad Hatter, and much more. It makes you wonder... what's ...
Space & Earth / Space Exploration
Jul 13, 2010 |
4.8 / 5 (27) |
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Seventh Graders Find a Cave on Mars
(PhysOrg.com) -- California middle school students using the camera on NASA's Mars Odyssey orbiter have found lava tubes with one pit that appears to be a skylight to a cave.
Space & Earth / Space Exploration
Jun 17, 2010 |
4.4 / 5 (39) |
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Team explains how dinosaurs rose to prominence
A shade more than 200 million years ago, the Earth looked far different than it does today. Most land on the planet was consolidated into one continent called Pangea. There was no Atlantic Ocean, and the rulers ...
Space & Earth / Earth Sciences
Mar 22, 2010 |
4.7 / 5 (17) |
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Sandtrapped Rover Makes a Big Discovery
Homer's Iliad tells the story of Troy, a city besieged by the Greeks in the Trojan War. Today, a lone robot sits besieged in the sands of Troy while engineers and scientists plot its escape.
Space & Earth / Space Exploration
Dec 03, 2009 |
4.8 / 5 (56) |
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New ancient fungus finding suggests world's forests were wiped out in global catastrophe
(PhysOrg.com) -- Scientists beleive extinct fungus species capitalised on a world-wide disaster and thrived on early Earth.
Space & Earth / Earth Sciences
Oct 01, 2009 |
4.5 / 5 (25) |
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Cloudy with a chance of pebble showers: Simulation suggests rocky exoplanet has bizarre atmosphere
(PhysOrg.com) -- So accustomed are we to the sunshine, rain, fog and snow of our home planet that we find it next to impossible to imagine a different atmosphere and other forms of precipitation.
Sep 29, 2009 |
4.7 / 5 (26) |
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Study on effect of electricity on liquids bucks conventional science (w/ Video)
(PhysOrg.com) -- Whether gazing into lava lamps or watching balsamic vinegar mix with olive oil, people have long been transfixed by the seemingly mystical way that droplets of one liquid find each other within ...
Sep 16, 2009 |
4.8 / 5 (17) |
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Planet Smash-Up Sends Vaporized Rock, Hot Lava Flying (w/ Video)
(PhysOrg.com) -- NASA's Spitzer Space Telescope has found evidence of a high-speed collision between two burgeoning planets around a young star.
Aug 10, 2009 |
4.6 / 5 (16) |
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Oxidized lava may help explain Earth's evolution
(AP) -- Material from volcanoes where the Earth's plates squeeze together is more oxidized than in regions where the seafloor splits apart, a finding that helps shed light on some of the basic processes in ...
Space & Earth / Earth Sciences
Jul 30, 2009 |
3.7 / 5 (6) |
2
Alchemy in Tanzania? Gas Becomes Solid at Surface of Oldoinyo Lengai Volcano
(PhysOrg.com) -- Science has unearthed the secret to what might have been alchemy at Oldoinyo Lengai volcano in Tanzania.
Space & Earth / Earth Sciences
May 06, 2009 |
4.1 / 5 (8) |
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Lava
Lava is molten rock expelled by a volcano during eruption. When first expelled from a volcanic vent, it is a liquid at temperatures from 700 °C to 1,200 °C (1,300 °F to 2,200 °F). Although lava is quite viscous, with about 100,000 times the viscosity of water, it can flow great distances before cooling and solidifying, because of both 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 (molten rock below the Earth's surface) was apparently in a short account written by Francesco Serao on the eruption of Vesuvius between May 14 and June 4, 1737. Serao described "a flow of fiery lava" as an analogy to the flow of water and mud down the flanks of the volcano following heavy rain.
For more information about Lava, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
