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 |
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A peek at a pitch-black pit
MESSENGER captured this high-resolution image of an elongated pit crater within the floor of the 355-km (220-mile) -wide crater Tolstoj on Mercury on Jan. 11, 2012. The low angle of sun illumination puts the ...
Space & Earth / Space Exploration
Mar 20, 2012 |
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Geologic map of Jupiter's moon Io details an otherworldly volcanic surface
More than 400 years after Galileo's discovery of Io, the innermost of Jupiter's largest moons, a team of scientists led by Arizona State University (ASU) has produced the first complete global geologic map ...
Space & Earth / Space Exploration
Mar 19, 2012 |
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Lava formations in eastern Oregon linked to rip in giant slab of Earth
Like a stream of air shooting out of an airplane's broken window to relieve cabin pressure, scientists at Scripps Institution of Oceanography at UC San Diego say lava formations in eastern Oregon are the result ...
Space & Earth / Earth Sciences
Feb 15, 2012 |
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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 |
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Volcanic destruction? Not always
For many, the story of Pompeii defines what happens when a volcano erupts: It destroys everything in its path and kills everyone who cannot escape.
Space & Earth / Earth Sciences
Dec 02, 2011 |
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Orange smoke billows out of Congolese volcano
Clouds of orange smoke and ash billowed out of Africa's most active volcano Nyamulagira, in the Democratic Republic of Congo, Tuesday after it erupted spectacularly at the weekend.
Space & Earth / Earth Sciences
Nov 08, 2011 |
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Mapping the formation of an underwater volcano
On Oct. 9 an underwater volcano started to emerge in waters off El Hierro Island in the Canaries, Spain. Researchers of the Spanish Institute of Oceanography (IEO, Ministry of Science and Innovation) only needed 15 days to ...
Space & Earth / Earth Sciences
Oct 28, 2011 |
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Fiery volcano offers geologic glimpse into land that time forgot
The first scientists to witness exploding rock and molten lava from a deep sea volcano, seen during a 2009 expedition, report that the eruption was near a tear in the Earth's crust that is mimicking the birth ...
Space & Earth / Earth Sciences
Oct 19, 2011 |
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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 |
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Alert level lowered on remote Alaska volcano
(AP) -- The Alaska Volcano Observatory has lowered the alert level for a remote Aleutian Islands volcano from "watch" to "advisory."
Space & Earth / Earth Sciences
Aug 31, 2011 |
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Lava rocks from three continents and oceanic plateau traced to same lava plume
(PhysOrg.com) -- The Sylhet Traps lava flows of the Shillong Plateau in northeastern India lie some 340 miles to the east of the Rajmahal Traps at the bend of the Ganges River as it flows south to the Bay ...
Space & Earth / Earth Sciences
Aug 19, 2011 |
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NASA plans to visit a near-Earth asteroid
In a few years a NASA spacecraft will seek the building blocks of life in a shovelful of asteroid dirt. The OSIRIS-REx spacecraft, targeted for launch in September 2016, will intercept asteroid 1999 RQ36, orbit it for a year, ...
Space & Earth / Space Exploration
Aug 17, 2011 |
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Satellite images show eruption on Alaska volcano
(AP) -- A volcano on a remote Alaska island has begun erupting, but poses little danger to people or aircraft, officials said Tuesday.
Space & Earth / Earth Sciences
Aug 10, 2011 |
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Martian water vs. the volcanoes
For decades NASA has been "following the water" on Mars with hopes of finding signs of alien life there; or at least signs that future colonists won't die of thirst. Now a Texas geologist has dared to revive ...
Space & Earth / Space Exploration
Jul 27, 2011 |
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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.
