Navigation Links
Study jointly led by UCSB researcher supports theory of extraterrestrial impact
Date:3/5/2012

(Santa Barbara, Calif.) A 16-member international team of researchers that includes James Kennett, professor of earth science at UC Santa Barbara, has identified a nearly 13,000-year-old layer of thin, dark sediment buried in the floor of Lake Cuitzeo in central Mexico. The sediment layer contains an exotic assemblage of materials, including nanodiamonds, impact spherules, and more, which, according to the researchers, are the result of a cosmic body impacting Earth.

These new data are the latest to strongly support of a controversial hypothesis proposing that a major cosmic impact with Earth occurred 12,900 years ago at the onset of an unusual cold climatic period called the Younger Dryas. The researchers' findings appear today in the Proceedings of the National Academy of Sciences.

Conducting a wide range of exhaustive tests, the researchers conclusively identified a family of nanodiamonds, including the impact form of nanodiamonds called lonsdaleite, which is unique to cosmic impact. The researchers also found spherules that had collided at high velocities with other spherules during the chaos of impact. Such features, Kennett noted, could not have formed through anthropogenic, volcanic, or other natural terrestrial processes. "These materials form only through cosmic impact," he said.

The data suggest that a comet or asteroid likely a large, previously fragmented body, greater than several hundred meters in diameter entered the atmosphere at a relatively shallow angle. The heat at impact burned biomass, melted surface rocks, and caused major environmental disruption. "These results are consistent with earlier reported discoveries throughout North America of abrupt ecosystem change, megafaunal extinction, and human cultural change and population reduction," Kennett explained.

The sediment layer identified by the researchers is of the same age as that previously reported at numerous locations throughout North Am
'/>"/>

Contact: Andrea Estrada
andrea.estrada@ia.ucsb.edu
805-893-4620
University of California - Santa Barbara
Source:Eurekalert  

Page: 1 2

Related biology news :

1. New study will help protect vulnerable birds from impacts of climate change
2. Law that regulates shark fishery is too liberal: UBC study
3. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
4. Leatherback turtle migration study identifies Pacific danger zones for endangered species
5. Study of wildfire trends in Northwestern California shows no increase in severity over time
6. Study shows earthworms to blame for decline of ovenbirds in northern Midwest forests
7. MU scientists study how to improve pesticide efficiency
8. Studying the importance of biological rhythms for the ecological performance of plants
9. Nowhere to hide: Study finds future of Sumatran tigers threatened by human disturbances
10. Cleveland Clinic Childrens Hospital launches study to genetically test for autism
11. Iowa State, Ames Lab chemists aid study of mutated plants that may be better for biofuels
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study jointly led by UCSB researcher supports theory of extraterrestrial impact
(Date:10/14/2014)... JOLLA, CA – October 14, 2014 – Scientists from ... million from the National Institutes of Health (NIH) to ... prevalent virus-induced hemorrhagic fever disease in Africa. The study ... and why some patients die, while others survive the ... to understand the basic mechanism of how Lassa fever ...
(Date:10/14/2014)... an international team of researchers, led by the Chinese ... journal Nature Genetics a brief genomic history ... of the tomato plant. , The C.M. Rick Tomato ... role in this study by providing seed of both ... study, which builds on the first tomato genome sequence ...
(Date:10/14/2014)... – Over the past decades, we have seen numerous ... the needs of infants for social contact and stimulation ... thrive. , Infancy and childhood are critical ... A generation of research suggests that enriched environments, full ... cognitive function. In contrast, deprivation and stress may compromise ...
Breaking Biology News(10 mins):Scripps Research Institute team receives $6.6 million to investigate deadly Lassa virus 2Institutional rearing may increase risk attention-deficit disorder 2
... the Keck School of Medicine of the University of ... estrogen, the female sex hormone, activates genes in breast-cancer ... to eventually lead to new treatments for the disease. ... of the Keck School,s Department of Biochemistry and Molecular ...
... and PARIS Nov. 15, 2011   ... authentication and endpoint protection solutions, today announced at ... France, that the company has open sourced its ... Open Source Edition (OSE), is free, portable software ...
... A $7.5 million award will help researchers harness ... create new types of antidotes for exposure to pesticides ... Institutes of Health (NIH), extends a previous grant and ... University, where chemists will collaborate with the U.S. Army ...
Cached Biology News:USC researchers discover key aspect of process that activates breast cancer genes 2DigitalPersona Open Sources New FingerJetFX Biometrics Technology for Mobile Devices, PCs and Servers 2DigitalPersona Open Sources New FingerJetFX Biometrics Technology for Mobile Devices, PCs and Servers 3Researchers get $7.5M grant to combat nerve agents 2Researchers get $7.5M grant to combat nerve agents 3
(Date:10/17/2014)... (PRWEB) October 17, 2014 ... offers a full line of Styrene-Butadiene polymer ... barrier coatings and a variety of other ... provide outstanding performance in these applications.  , ... in performance and cost effectiveness.  SB polymer ...
(Date:10/17/2014)... (PRWEB) October 17, 2014 The North ... concerned market in North America with analysis and forecast ... in 2013, and is expected to reach $1329.6 million ... to 2018. , Browse through the TOC of the ... idea of the in-depth analysis provided. This also provides ...
(Date:10/17/2014)... Mediso stellt den MultiScan ... MultiScan-Produktreihe, das speziell für Forschungsanwendungen in der klinischen ... (Large Field of view Extreme Resolution) mit einem ... Sichtfeld in Breitenrichtung von 15 cm, einer PET-Auflösung ... % soll für die vorklinische Hirnforschung eingesetzt werden. ...
(Date:10/17/2014)... DUBLIN , October 17, 2014 /PRNewswire/ ... - Research and Markets ( http://www.researchandmarkets.com/research/6cbkgn/latest_guidebook ) ... Guidebook for Conducting Medical Device Clinical Evaluation ... to Practices (2014 Edition)"  report to their ... , China,s regulatory framework ...
Breaking Biology Technology:Mallard Creek Polymers Reminds Industry of the Full Line of Styrene-Butadiene Polymer Emulsions 2The North American flexible display market and is expected to reach $1329.6 million by 2018 - New Report by MicroMarket Monitor 2The North American flexible display market and is expected to reach $1329.6 million by 2018 - New Report by MicroMarket Monitor 3Mediso enthüllt neues Forschungswerkzeug MultiScan LFER 150 PET/CT 2Latest Guidebook for Conducting Medical Device Clinical Evaluation and Clinical Trial in China: From Regulations to Practices (2014 Edition) 2Latest Guidebook for Conducting Medical Device Clinical Evaluation and Clinical Trial in China: From Regulations to Practices (2014 Edition) 3
... the Project on Emerging Nanotechnologies (PEN) at the ... variety of voluntary options available for the oversight ... Voluntary Initiatives, Regulation, and Nanotechnology Oversight: Charting a ... Center for Environmental Policy at American University, provides ...
... content="bioMerieux and Biocartis Sign Strategic Partnership in Molecular Diagnostics. Co-development of ... launch in 2012,bioMerieux gains exclusive rights in microbiology,bioMerieux takes equity stake ... in Molecular... -- MARCY L,ETOILE, France and LAUSANNE, Switzerland, Nov. 4, ... ...
... Novavax, Inc. (Nasdaq: NVAX ) announced ... grants under the Internal Revenue Service,s Qualifying Therapeutic Discovery ... Protection and Affordable Care Act of 2010 to provide ... of eligible qualified investments in therapeutic discovery projects during ...
Cached Biology Technology:bioMerieux and Biocartis Sign Strategic Partnership in Molecular Diagnostics 2bioMerieux and Biocartis Sign Strategic Partnership in Molecular Diagnostics 3bioMerieux and Biocartis Sign Strategic Partnership in Molecular Diagnostics 4bioMerieux and Biocartis Sign Strategic Partnership in Molecular Diagnostics 5bioMerieux and Biocartis Sign Strategic Partnership in Molecular Diagnostics 6bioMerieux and Biocartis Sign Strategic Partnership in Molecular Diagnostics 7bioMerieux and Biocartis Sign Strategic Partnership in Molecular Diagnostics 8bioMerieux and Biocartis Sign Strategic Partnership in Molecular Diagnostics 9
... proteases/caspases initiates apoptosis in mammalian cells. ... provides a simple and convenient means for ... in intact cells. The assay utilizes ... linked to rhodamine 110 (D2R), a reported ...
...
The PROTEAN II slab gel casting stand is a component of the PROTEAN II XL and xi casting apparatus. It is supplied with gaskets....
BD Falcon insert HTS 96 well, square A-bottom with lid. PET membrane, sterile. (5/ca) Packaging: 5 / pack, 5 / case ...
Biology Products: