Navigation Links
Global extinction: Gradual doom as bad as abrupt
Date:2/6/2012

The deadliest mass extinction of all took a long time to kill 90 percent of Earth's marine life--and it killed in stages--according to a newly published report.

It shows that mass extinctions need not be sudden events.

Thomas Algeo, a geologist at the University of Cincinnati, and 13 colleagues have produced a high-resolution look at the geology of a Permian-Triassic boundary section on Ellesmere Island in the Canadian Arctic.

Their analysis, published today in the Geological Society of America Bulletin, provides strong evidence that Earth's biggest mass extinction phased in over hundreds of thousands of years.

About 252 million years ago, at the end of the Permian period, Earth almost became a lifeless planet.

Around 90 percent of all living species disappeared then, in what scientists have called "The Great Dying."

Algeo and colleagues have spent much of the past decade investigating the chemical evidence buried in rocks formed during this major extinction.

The world revealed by their research is a devastated landscape, barren of vegetation and scarred by erosion from showers of acid rain, huge "dead zones" in the oceans, and runaway greenhouse warming leading to sizzling temperatures.

The evidence that Algeo and his colleagues are looking at points to massive volcanism in Siberia as a factor.

"The scientists relate this extinction to Siberian Traps volcanic eruptions, which likely first affected boreal life through toxic gas and ashes," said H. Richard Lane, program director in the National Science Foundation's (NSF) Division of Earth Sciences, which funded the research.

The Siberian Traps form a large region of volcanic rock in Siberia. The massive eruptive event which formed the traps, one of the largest known volcanic events of the last 500 million years of Earth's geologic history, continued for a million years and spanned the Permian-Triassic boundary.


'/>"/>
Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Verified Clinical Trials System Implemented at Leading Global Contract Research Organization to Improve Participant Safety and Data Integity
2. Global experts question claims about jellyfish populations
3. Biodiversity enhances ecosystems global drylands -- Ben-Gurion U researchers
4. Geoengineering and global food supply
5. Nanotechnology in Medical Applications: The Global Market
6. Ecologists gain insight into the likely consequences of global warming
7. New report reviews plan for US Global Change Research Program
8. Forest health versus global warming: Fuel reduction likely to increase carbon emissions
9. Hellbender salamander study seeks answers for global amphibian decline
10. Global resource for clinical microbiologists and immunologists debuts
11. Tropical disease experts report missed opportunity to transform global HIV/AIDS fight
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Global extinction: Gradual doom as bad as abrupt
(Date:7/11/2014)... have set a "mouse TRAP" to capture the early ... study published in the Journal of Clinical Investigation ... called TRAP to extract cellular and genetic information from ... at the Rockefeller Institute for Medical Research in 2008, ... machinery, or ribosomes, of the cell type of interest. ...
(Date:7/11/2014)... group members to reduce aggression and gain access to ... grooming activities shows a certain pattern across the day. ... Biology Letters . , Grooming between individuals in ... motives. To be groomed has hygienic benefits and is ... can provide access to infants, mating opportunities and high ...
(Date:7/11/2014)... risk of kidney injury related to the use of ... of HES molecules, according to a report in ... Anesthesia Research Society (IARS). , The "total mass of ... cultured human renal proximal tubule cells (PTCs), concludes the ... University Hospital Wrzburg, Austria. Other factorssuch as differences ...
Breaking Biology News(10 mins):Baboons groom early in the day to get benefits later 2In lab studies, hydroxyethyl starch has direct harmful effects on kidney cells 2
... A new neuroimaging study conducted by researchers from the ... de Montral at the International laboratory for Brain Music ... amusic individuals have more grey matter in specific regions ... the right interior frontal gyrus and the right auditory ...
... Approximately one in every 500 to 650 baby boys is ... genetic code that until a few years ago was thought ... no longer the case. A recent conference hosted by NewYork-Presbyterian ... raising awareness of the condition and the recent availability of ...
... chew up rattlesnake skin and smear it on their ... a new study by researchers at UC Davis. ... UC Davis, observed ground squirrels (Spermophilus beecheyi) and rock ... picking up pieces of shed snakeskin, chewing it and ...
Cached Biology News:Jingle bells not merry for tone-deaf individuals 2Jingle bells not merry for tone-deaf individuals 3Physician-scientists seek solutions to reproductive problems related to chromosomal variations 2Physician-scientists seek solutions to reproductive problems related to chromosomal variations 3
(Date:7/10/2014)... Boston, Mass. (PRWEB) July 10, 2014 ... , today announced that Alan Swahn, a former vice ... Terascala’s executive team as vice president of marketing. Terascala’s ... from Dell and NetApp create the highest performance and ... has been appointed to guide Terascala’s channel expansion and ...
(Date:7/10/2014)... EvoDerma ’s NOOME Anti-Aging Motion has been upgraded ... with a second treatment cup to help prevent and smooth ... is thinner on the edges for a softer contact with ... uneven surfaces on the face, neck and décolleté. Choose to ... areas such as the cheeks and neck, or opt for ...
(Date:7/10/2014)... , July 10, 2014  Kainos Capital, a ... brands, today announced that it has acquired the Slim-Fast ... in the business. Terms of the transaction were not ... and meal replacement business that markets ready-to-drink shakes, powders, ... North America and in the ...
(Date:7/10/2014)... According to the International Atomic Energy Agency (IAEA) ... terrorists acquiring sufficient quantities of plutonium or highly ... explosive device. The IAEA also notes that most ... quantities, which can be challenging to detect with ... study appearing this week in the Journal ...
Breaking Biology Technology:Terascala Expands Executive Team 2Terascala Expands Executive Team 3Introducing a New Bonus Treatment Cup for EvoDerma’s NOOME Anti-Aging Motion 2Kainos Capital Acquires Slim-Fast From Unilever 2Sensitive detection method may help impede illicit nuclear trafficking 2
... ... ... ... , ...
... ... for different body types and shampoo bottles shaped to closely match the size of ... to redesign armor for troops in Afghanistan. , ... Madison, NJ, USA (PRWEB) February 24, 2010 -- Interactive exhibits make learning ...
... ... ... , ... , , , , ...
Cached Biology Technology:Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 2Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 3Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 4Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 5Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 6Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 7Science by the Seat of Their Pants - Museum Goers, Industry and the Military Take Pressure Off with Body Mapping 2Science by the Seat of Their Pants - Museum Goers, Industry and the Military Take Pressure Off with Body Mapping 3Ocera Therapeutics Completes Phase 2B Enrollment in the ASTUTE Trial 2Ocera Therapeutics Completes Phase 2B Enrollment in the ASTUTE Trial 3Ocera Therapeutics Completes Phase 2B Enrollment in the ASTUTE Trial 4Ocera Therapeutics Completes Phase 2B Enrollment in the ASTUTE Trial 5
Mouse Amphiregulin MAb (Clone 206220)...
Anti-Digoxigenin-AP, Fab fragments; from sheep...
The antibody recognizes the peptide sequence ESESQGPK (aa 441-448) of human class III beta-tubulin specific for neurones....
Unique enzyme blend containing Taq and Pwo DNA Polymerase and another thermostable enzyme. The Expand 20 kbPLUS PCR System also includes an optimized reaction buffer, MgCl2 solution, and a human cont...
Biology Products: