volcanic vent


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volcanic vent

[väl′kan·ik ′vent]
(geology)
The channelway or opening of a volcano through which magma ascends to the surface; two general types are fissure and pipelike vents.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
It is thus not remote that within the caldera, where the town center straddles, volcanic vents may appear anywhere, Diolata said.
Hall and others have studied which marine animals, plants and microbes might be "winners" or "losers" in low pH (acidified) areas around volcanic vents off Sicily and other international sites.
On Earth, jarosite can form in ore deposits or from alteration near volcanic vents, and indicates an oxidizing and acidic environment.
"So, archaea dwelling near superheated volcanic vents would definitely have a selective advantage for surviving a catastrophe like this," wrote commenter bruzote.
Experiments by the late Carl Sagan of Cornell and others have shown that amino acids and other bio molecules could have been formed in primordial oceans, drawing energy from lightning or volcanic vents. But in the vast ocean, how could these molecules come together often enough to assemble into more complex structures, and what protected them from the harsh environment?
Experiments by the late Carl Sagan of Cornell and others have shown that amino acids and other biomolecules could have been formed in primordial oceans, drawing energy from lightning or volcanic vents. But in the vast ocean, how could these molecules come together often enough to assemble into more complex structures, and what protected them from the harsh environment?
Why, they can even cook you a steak over the volcanic vents.
Key Dates 1964 Alvin's first dive 1966 Located a submerged bomb 1971 Attacked by blue marlin 1974 First up-close look at the Mid Atlantic Ridge, an underwater mountain range 1977 Explored volcanic vents 1986 Explored sunken Titanic 1994 Dives to record 4,500 meters 1996 Studies life around decaying whale bodies on seafloor 2004 Completes 4,000th dive 1.
FREEZY DOES IT Scientist lowers himself into an ice cave formed by volcanic vents in Antarctica
On our own planet, we have a variety of habitats running the gamut from superheated waters near subsurface volcanic vents to the extremely dry, frozen regions that compose the Antarctic valleys.
Reykjavik The Icelandic capital is probably best known for its volcanic vents and steaming hot geysers, which give rise to thermal spas.