Navigation Links
September Geology and GSA Today media highlights
Date:8/22/2008

atmosphere, climate, and life. The geological record for the past one billion years is sufficiently well documented that we have a first-order picture of the changing positions of continents. Using these reconstructions in combination with other data, Murphy and Nance show that supercontinents form by different mechanisms and that many current geodynamic models cannot explain the processes that led to the amalgamation of Pangea. These models suggest that plate tectonics is primarily driven by subduction and that supercontinents break up and migrate from sites of mantle upwelling to reassemble at sites of mantle downwelling where subduction zones exist. Such models would predict that the young oceans created by the breakup of a supercontinent some 600 million years ago would have continued to expand as the continental fragments migrated toward sites of mantle downwelling that existed in the older ancestral Pacific Ocean. Instead, Pangea assembled as a result of the closure of the young oceans. The geologic record suggests that there are geodynamic linkages between the younger and older oceans that deserve more detailed study; it also suggests that, in the case of Pangea, the reversal in continental motion may have coincided with emergence of a superplume 460? million years ago that produced mantle upwelling in the ancestral Pacific. If so, the top-down geodynamics driven by subduction, which accounts for the assembly of the supercontinent that broke up 600 million years ago, may have been overpowered by bottom-up geodynamics involving large-scale mantle upwelling that led to the amalgamation of Pangea.


Stepwise extinction of larger foraminifers at the Cenomanian-Turonian boundary: A shallow-water perspective on nutrient fluctuations during Oceanic Anoxic Event 2 (Bonarelli Event)

Mariano Parente et al., Dipartimento di Scienze della Terra, Universita "Federico II" Napoli, Largo San Marcellino 10, 80138 Napoli, Italy. Pages 715-718.<
'/>"/>

Contact: Christa Stratton
cstratton@geosociety.org
303-357-1093
Geological Society of America
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9 10 11 12

Related biology news :

1. September 2008 Biology of Reproduction highlights
2. Story tips from the US Department of Energys Oak Ridge National Laboratory, September 2007
3. Highlights from the September 2007 Journal of the American Dietetic Association
4. September Geology and GSA Today media highlights
5. August 2008 Geology and GSA Today media highlights
6. July 2008 GEOLOGY and GSA Today media highlights
7. Beaded viruses and geology-inspired paintings show the art in science
8. Geology and biology meet in the history of US southwestern desert surface waters
9. March GEOLOGY and GSA TODAY media highlights
10. February Geology and GSA Today media highlights
11. December GEOLOGY and GSA TODAY media highlights
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2014)... A Mayo Clinic researcher and his collaborators have developed ... enhance the process of re-engineering cells for biomedical investigation. ... biology methods to aid stem cell engineering. Details of ... described in two back-to-back papers in the journal ... range of uses for all types of cell-based investigations ...
(Date:8/28/2014)... , Aug. 28, 2014  Privacy Advocate and ... Jennifer Lynch , joins the lineup of biometric ... second annual Biometrics UnPlugged Executive Summit in ... Previously announced speakers include Steven Rahman, Director, Technology ... Public Sector at Experian. The theme of this year,s ...
(Date:8/28/2014)... the most commonly diagnosed learning disability in the ... occurs when the regions of the brain that ... use of non-invasive functional neuroimaging tools has helped ... However, most prior work has focused on only ... gap in our understanding of how multiple brain ...
Breaking Biology News(10 mins):New tool aids stem cell engineering for medical research 2Biometrics UnPlugged Welcomes the Electronic Frontier Foundation's Jennifer Lynch to the Mobility at the Crossroads of Commerce and Privacy Summit 2Dyslexic readers have disrupted network connections in the brain 2
... clams to flying creatures like hummingbirds and bats, many ... flow. When the 61st Annual Meeting of the American ... from November 23-25 at the San Antonio Convention Center, ... with applications in astronomy, engineering, alternative energy, biology, and ...
... University] Imagine yourself swimming in a pool: It,s the ... the water, that mostly dictates the speed and direction that ... Microbes, speed and direction are subjected more to the physical ... swim in water," explained Jay Tang, associate professor of physics ...
... land use patterns and increasing pressures on water ... management focuses on regulating the flow of runoff ... the hydrologic cycle disrupted by extensive pavement and ... of infiltration opportunities affects groundwater recharge and has ...
Cached Biology News:Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25 2Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25 3Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25 4Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25 5Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25 6Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25 7Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25 8How do bacteria swim? Brown physicists explain 2Urban trees enhance water infiltration 2
(Date:8/28/2014)... Willow Grove, PA (PRWEB) August 28, 2014 ... talent, and create a culture that will allow individuals ... that are becoming increasingly important for employers looking to ... life science industries are embracing this trend, as the ... the fabric of a company, which will have real ...
(Date:8/28/2014)... 2014 Sterlitech is proud to announce ... its stable of products . These additional ... and include membrane filters with surface charges. ... demand for our membrane process testing equipment, and correspondingly, ... sheet membranes,” explains Sterlitech President Mark Spatz. “The ...
(Date:8/28/2014)... Scientists, researchers, and technologists will converge ... Damage 2014 symposium. Marking its 46th year, the ... run 14-17 September. The event is sponsored by ... , The premier conference for basic and applied issues ... materials will engage researchers and engineers from numerous industries ...
(Date:8/28/2014)... MA (PRWEB) August 28, 2014 ... wholesale construction materials, selected SoundConnect to ... their cloud based audio and web conferencing platform ... to support PrimeSource’s employees’ needs. SoundConnect delivers ... , PrimeSource Building Products will be utilizing ...
Breaking Biology Technology:Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 2Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 3Sterlitech Corporation Enhances Its Selection of Flat Sheet Membrane Filters 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 3PrimeSource Chooses SoundConnect as Collaboration Provider 2
... Impact on Families of von ... Willebrand Disease, NEW YORK, ... most common hereditary bleeding disorder, von,Willebrand disease (VWD), most don,t even know ... Centers for Disease Control and,Prevention (CDC) it takes a woman an average ...
... DIEGO, Sept. 23 Halozyme Therapeutics,Inc. (Nasdaq: ... targeting the extracellular matrix, today,announced that Douglas B. ... Endocrinology Clinical Development., "I am thrilled to ... achievement to the Halozyme leadership team. He is ...
... 85,000 Expected to Enroll in Phase 4 Study ... Wyeth Pharmaceuticals, a,division of Wyeth (NYSE: WYE ... Pneumonia Immunization Trial in Adults a major study ... to help,prevent pneumococcal pneumonia -- the leading cause ...
Cached Biology Technology:Video: Moms Raise 'Red Flag' About the Dangers of Widely Undiagnosed Bleeding Disorder 2Video: Moms Raise 'Red Flag' About the Dangers of Widely Undiagnosed Bleeding Disorder 3Video: Moms Raise 'Red Flag' About the Dangers of Widely Undiagnosed Bleeding Disorder 4Halozyme Therapeutics Appoints Head of Endocrinology Clinical Development 2Halozyme Therapeutics Appoints Head of Endocrinology Clinical Development 3Halozyme Therapeutics Appoints Head of Endocrinology Clinical Development 4Major Adult Vaccine Clinical Trial for Pneumonia Prevention Begins 2Major Adult Vaccine Clinical Trial for Pneumonia Prevention Begins 3Major Adult Vaccine Clinical Trial for Pneumonia Prevention Begins 4Major Adult Vaccine Clinical Trial for Pneumonia Prevention Begins 5
... GenomePlex Single Cell Whole Genome Amplification ... on random fragmentation of genomic DNA ... fragments to PCR-amplifiable library molecules flanked ... achieved by PCR amplification of the ...
...
From formula-fed bovine calves Sterile, Cell culture tested...
Collected at a certified USDA establishment located within the United States. All final processing is done by Quad Five employees....
Biology Products: