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Death Valley’s volcanic superblast: Scientists find another potential ticking time-bomb in the U.S.!!!

 
Luisport

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01/24/2012 05:20 AM

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Death Valley’s volcanic superblast: Scientists find another potential ticking time-bomb in the U.S.!!!
January 24, 2012 – CALIFORNIA- In California’s Death Valley, death is looking just a bit closer. Geologists have determined that the half-mile-wide Ubehebe Crater, formed by a prehistoric volcanic explosion, was created far more recently than previously thought—and that conditions for a sequel may exist today. Up to now, geologists were vague on the age of the 600-foot deep crater, which formed when a rising plume of magma hit a pocket of underground water, creating an explosion. The most common estimate was about 6,000 years, based partly on Native American artifacts found under debris. Now, a team based at Columbia University’s Lamont-Doherty Earth Observatory has used isotopes in rocks blown out of the crater to show that it formed just 800 years ago, around the year 1200. That geologic youth means it probably still has some vigor; moreover, the scientists think there is still enough groundwater and magma around for another eventual reaction. The study appears in the current issue of the journal Geophysical Research Letters. Ubehebe (YOU-bee-HEE-bee) is the largest of a dozen such craters, or maars, clustered over about 3 square kilometers of Death Valley National Park. The violent mixing of magma and water, resulting in a so-called phreatomagmatic explosion, blew a hole in the overlying sedimentary rock, sending out superheated steam, volcanic ash and deadly gases such as sulfur dioxide.... [link to theextinctionprotocol.wordpress.com]

Last Edited by Luisport on 01/24/2012 05:23 AM
Luisport (OP)

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01/24/2012 05:21 AM

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Re: Death Valley’s volcanic superblast: Scientists find another potential ticking time-bomb in the U.S.!!!
bump
Luisport (OP)

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01/24/2012 05:22 AM

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Re: Death Valley’s volcanic superblast: Scientists find another potential ticking time-bomb in the U.S.!!!
... Study coauthor Brent Goehring, (now at Purdue University) says this would have created an atom-bomb-like mushroom cloud that collapsed on itself in a donut shape, then rushed outward along the ground at some 200 miles an hour, while rocks hailed down. Any creature within two miles or more would be fatally thrown, suffocated, burned and bombarded, though not necessarily in that order. “It would be fun to witness—but I’d want to be 10 miles away,” said Goehring of the explosion. The team began its work after Goehring and Lamont-Doherty professor Nicholas Christie-Blick led students on a field trip to Death Valley. Noting that Ubehebe remained poorly studied, they got permission from the park to gather some 3- to 6-inch fragments of sandstone and quartzite, part of the sedimentary conglomerate rock that the explosion had torn out. In the lab, Goehring and Lamont-Doherty geochemist Joerg Schaefer applied recent advances in the analysis of beryllium isotopes, which change their weight when exposed to cosmic rays. The isotopes change at a predictable rate when exposed. -Physics... [link to theextinctionprotocol.wordpress.com]
Luisport (OP)

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01/24/2012 05:27 AM

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Re: Death Valley’s volcanic superblast: Scientists find another potential ticking time-bomb in the U.S.!!!
abomb
Anonymous Coward
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01/24/2012 05:27 AM
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Re: Death Valley’s volcanic superblast: Scientists find another potential ticking time-bomb in the U.S.!!!
nice find OP 5 stars from me
Luisport (OP)

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01/24/2012 05:28 AM

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Re: Death Valley’s volcanic superblast: Scientists find another potential ticking time-bomb in the U.S.!!!
nice find OP 5 stars from me
 Quoting: Anonymous Coward 1468761


hf Thank's!!!
Luisport (OP)

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01/24/2012 05:33 AM

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Re: Death Valley’s volcanic superblast: Scientists find another potential ticking time-bomb in the U.S.!!!
bump
Luisport (OP)

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01/24/2012 05:40 AM

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Re: Death Valley’s volcanic superblast: Scientists find another potential ticking time-bomb in the U.S.!!!
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