• UCSBgauchos twitter avatar
    What a way to start off the season! @UCSBMensSoccer tops No.5 Stanford 1-0 Friday. RECAP >>> http://t.co/gPhjHwqFP0 http://t.co/z7Z90RLG5D
    1 day 11 hours ago
  • UCSBgauchos twitter avatar
    The Gauchos start the 2015 season off in style, hold No. 8 Stanford scoreless to win 1-0. @UCSBMensSoccer first win over Stanford since 2004
    1 day 12 hours ago
  • UCSBgauchos twitter avatar
    Stanford trying desperately to get on the board but UCSB's backline can't be beat. Gauchos lead 1-0 with 5 minutes to go
    1 day 12 hours ago
  • UCSBgauchos twitter avatar
    Ahinga Selemani beats his defender to set up Geoffrey Acheampong beautifully in the box, but the lefty's shot goes wide of the post
    1 day 13 hours ago
  • UCSBgauchos twitter avatar
    Stanford with a pair of good chances with just under 30 minutes to go but UCSB still finds a way to keep them off the board and lead 1-0
    1 day 13 hours ago
  • UCSBgauchos twitter avatar
    .@UCSBMensSoccer leading No. 8 Stanford 1-0 at the half thanks to a goal by who else, Nick DePuy. Great first half for the Gauchos
    1 day 13 hours ago
  • UCSBgauchos twitter avatar
    GOAL! Seo-In Kim sends a cross far post and Nick DePuy heads it in to put the Gauchos up 1-0 with 3 minutes left in the half
    1 day 14 hours ago
  • UCSBgauchos twitter avatar
    Women's Soccer: San Jose State 1, UC Santa Barbara 1 (Final - 2OT) UCSB, San Jose State Battle to 1-1 Tie http://t.co/KolrGPE4AY
    1 day 14 hours ago
  • UCSBgauchos twitter avatar
    Big save by Vom Steeg to keep the game scoreless! 25 min left in 1st half @UCSBMensSoccer
    1 day 14 hours ago
  • UCSBgauchos twitter avatar
    Stanford has the advantage in the run of play through 10 minutes but it's still 0-0. @UCSBMensSoccer
    1 day 14 hours ago
  • UCSBgauchos twitter avatar
    WVB: UCSB Opens Season with Back-to-Back Sweeps! #GoGauchos http://t.co/yye1PtugDW
    1 day 15 hours ago
  • UCSBgauchos twitter avatar
    Heres UCSB's starting lineup against Stanford: Vom Steeg, Quezada, Strong, Backus, Jome, Espana, Feucht, Murphy, Acheampong, Selemani, DePuy
    1 day 15 hours ago
  • UCSBgauchos twitter avatar
    Don't miss @UCSBMensSoccer season opener against Stanford. Kickoff in 10 minutes!
    1 day 15 hours ago
  • UCSBgauchos twitter avatar
    @UCSBWomenSoccer ties San Jose St. 1-1 in home season opener behind early goal by Mallory Hromatko
    1 day 15 hours ago
  • UCSBgauchos twitter avatar
    RT @UCSB_Volleyball: Make that two sweeps on opening day! We topped UIW 3-0 and are now 2-0!… https://t.co/iybbM7N1tn
    1 day 15 hours ago

Study Jointly Led by UCSB Researcher Finds New Evidence Supporting Theory of Extraterrestrial Impact

Monday, June 11, 2012 - 17:00
Santa Barbara, CA

imagetn.aspx_.jpg

Full description below. †

An 18-member international team of researchers that includes James Kennett, professor of earth science at UC Santa Barbara, has discovered melt-glass material in a thin layer of sedimentary rock in Pennsylvania, South Carolina, and Syria. According to the researchers, the material –– which dates back nearly 13,000 years –– was formed at temperatures of 1,700 to 2,200 degrees Celsius (3,100 to 3,600 degrees Fahrenheit), and is the result of a cosmic body impacting Earth.

These new data are the latest to strongly support the controversial Younger Dryas Boundary (YDB) hypothesis, which proposes that a cosmic impact occurred 12,900 years ago at the onset of an unusual cold climatic period called the Younger Dryas. This episode occurred at or close to the time of major extinction of the North American megafauna, including mammoths and giant ground sloths; and the disappearance of the prehistoric and widely distributed Clovis culture. The researchers' findings appear today in the Proceedings of the National Academy of Sciences.

"These scientists have identified three contemporaneous levels more than 12,000 years ago, on two continents yielding siliceous scoria-like objects (SLO's)," said H. Richard Lane, program director of National Science Foundation's Division of Earth Sciences, which funded the research. "SLO's are indicative of high-energy cosmic airbursts/impacts, bolstering the contention that these events induced the beginning of the Younger Dryas. That time was a major departure in biotic, human and climate history."

Morphological and geochemical evidence of the melt-glass confirms that the material is not cosmic, volcanic, or of human-made origin. "The very high temperature melt-glass appears identical to that produced in known cosmic impact events such as Meteor Crater in Arizona, and the Australasian tektite field," said Kennett.

"The melt material also matches melt-glass produced by the Trinity nuclear airburst of 1945 in Socorro, New Mexico," he continued. "The extreme temperatures required are equal to those of an atomic bomb blast, high enough to make sand melt and boil."

The material evidence supporting the YDB cosmic impact hypothesis spans three continents, and covers nearly one-third of the planet, from California to Western Europe, and into the Middle East. The discovery extends the range of evidence into Germany and Syria, the easternmost site yet identified in the northern hemisphere. The researchers have yet to identify a limit to the debris field of the impact.

"Because these three sites in North America and the Middle East are separated by 1,000 to 10,000 kilometers, there were most likely three or more major impact/airburst epicenters for the YDB impact event, likely caused by a swarm of cosmic objects that were fragments of either a meteorite or comet," said Kennett.

The PNAS paper also presents examples of recent independent research that supports the YDB cosmic impact hypothesis, and supports two independent groups that found melt-glass in the YDB layers in Arizona and Venezuela. "The results strongly refute the assertion of some critics that ‘no one can replicate' the YDB evidence, or that the materials simply fell from space non-catastrophically," Kennett noted.

He added that the archaeological site in Syria where the melt-glass material was found –– Abu Hureyra, in the Euphrates Valley –– is one of the few sites of its kind that record the transition from nomadic hunter-gatherers to farmer-hunters who live in permanent villages. "Archeologists and anthropologists consider this area the ‘birthplace of agriculture,' which occurred close to 12,900 years ago," Kennett said.

"The presence of a thick charcoal layer in the ancient village in Syria indicates a major fire associated with the melt-glass and impact spherules 12,900 years ago," he continued. "Evidence suggests that the effects on that settlement and its inhabitants would have been severe."

Other scientists contributing to the research include Ted Bunch and James H. Wittke of Northern Arizona University; Robert E. Hermes of Los Alamos National Laboratory; Andrew Moore of the Rochester Institute of Technology; James C. Weaver of Harvard University; Douglas J. Kennett of Pennsylvania State University; Paul S. DeCarli of SRI International; James L. Bischoff of the U.S. Geological Survey; Gordon C. Hillman of the University College London; George A. Howard of Restoration Systems; David R. Kimbel of Kimstar Research; Gunther Kletetschka of Charles University in Prague, and of the Czech Academy of Science; Carl Lipo and Sachiko Sakai of California State University, Long Beach; Zsolt Revay of the Technical University of Munich in Germany; Allen West of GeoScience Consulting; and Richard B. Firestone of Lawrence Berkeley National Laboratory.

 

 


 

 

[RETURN TO TOP]  

 

 

Middle image: Microscopic images of grains of melted quartz from the YDB cosmic impact layer at Abu Hureyra, Syria, showing evidence of burst bubbles and flow textures that resulted from the melting and boiling of rock at very high temperatures.

(Light microscope image at left; SEM image at right.)

 

 

†† Bottom image: Photos of melt glass known as trinitite formed at the ground surface from the melting of sediments and rocks by the very high temperatures of the Trinity nuclear airburst in New Mexico in 1945. This material is very similar to the glassy melt materials now reported from the cosmic impact YDB layer, consistent with the very high temperature origin of the melt materials in the YDB layer.

 

Proceedings of the National Academy of Sciences

After reading this article I feel