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:3/24/2015)... 24, 2015 Research and Markets ( ... "Global Iris Recognition Market 2015-2019" report to their ... Recognition market to grow at a CAGR of 23.5 ... covers the present scenario and the growth prospects of ... To calculate the market size, the report considers the ...
(Date:3/24/2015)... NexID Biometrics LLC, whose spoof-mitigation technology boosts protection ... beginning of shipments of version 2.0 of its industry ... in Potsdam, N.Y. , is making ... here today at the Walter E. Washington Convention Center. ... boosts the accuracy rate range to 96.5 to 99.5 ...
(Date:3/23/2015)... 23, 2015 SoundView Technology Group issues a new ... NXTD ) Wocket smart wallet. SoundView was one of the selected ... experience with the Wocket in multiple scenarios and outlets. ... and other retailers, making both debit and credit card payments.  ... says, "If the company meets their plans in 2015, it ...
Breaking Biology News(10 mins):Global Iris Recognition Market 2015-2019 with 3M Cogent, Bioenable Technologies, Cross Match Technology, Iris ID Systems & Safran Dominating 2NexID Begins Shipments Of Version 2.0 Fake-Finger-Detection Solution 2Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 2Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 3Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 4
... The bubbles in your champagne that appear to jump out ... quite similar to the tiny bubbles found throughout the world,s oceans, ... the champagne bubbles are likely to raise your spirits, those in ... "Bubbles are little packets of gases that rise or fall ...
... in the American diet by as little as one-half teaspoon ... attacks and 92,000 deaths each year, according to a new ... from reductions in smoking and could save the United States ... A team from the University of California, San Francisco, ...
... PHILADELPHIA - Biologists at the University of Pennsylvania studying ... longstanding conundrum: How can organisms be robust against the ... changes? The short answer, according to University ... two requirements are often not contradictory and that an ...
Cached Biology News:Bubble physicist counts bubbles in the ocean to answer questions about climate, sound, light 2Bubble physicist counts bubbles in the ocean to answer questions about climate, sound, light 3Even small dietary reductions in salt could mean fewer heart attacks, strokes and deaths 2Even small dietary reductions in salt could mean fewer heart attacks, strokes and deaths 3Penn biologists explain how organisms can tolerate mutations, yet adapt to environmental change 2
(Date:4/21/2015)... PROVO, Utah , April 21, 2015  Tute Genomics, ... the hiring of Josh Forsythe as VP of ... that has witnessed a significant expansion in its commercial operations ... " Josh Forsythe is a ... Robison , MD MBA, CEO of Tute Genomics. "Josh,s vast ...
(Date:4/21/2015)... RESEARCH TRIANGLE PARK, N.C. , April 21, 2015 ... announced today that it will release its first quarter ... 28, 2015. United Therapeutics will host a ... a.m. Eastern Time.  The teleconference is accessible by dialing ... the teleconference will be available for one week and ...
(Date:4/21/2015)... Whether it’s used for troubleshooting in a ... a Kessler CineDrive in a cinematic studio setting, ... TS3-H is designed to help any shooter create vivid ... sensor, the TS5-H offers the same convenient touchscreen controls and ... , According to Tom Boldt for Fastec, “We believe that ...
(Date:4/20/2015)... (PRWEB) April 20, 2015 PMG ... its 12th clinical research site: PMG Research of Christie ... operation of the clinical research department at Christie ... the Southeast to a second region within the United ... physician practice enhances PMG’s access to an additional 80,000 ...
Breaking Biology Technology:Tute Genomics Continues Expansion of Genomic Medicine Commercial Operations; Appoints Josh Forsythe as New VP of Marketing 2Tute Genomics Continues Expansion of Genomic Medicine Commercial Operations; Appoints Josh Forsythe as New VP of Marketing 3Tute Genomics Continues Expansion of Genomic Medicine Commercial Operations; Appoints Josh Forsythe as New VP of Marketing 4Fastec Imaging Releases the TS5-H High Definition High-Speed Camera 2Fastec Imaging Releases the TS5-H High Definition High-Speed Camera 3PMG Research Announces the Formation of its 12th Site in Champaign-Urbana, IL 2PMG Research Announces the Formation of its 12th Site in Champaign-Urbana, IL 3
... N.Y., March 24 China,s State Food ... the pioneering Lucid VivaScope(R),reflective confocal microscope in ... CEO of Lucid, a Rochester, New York-based ... improved care for dermatology,patients., Lucid,s VivaScope(R) ...
... CMPMedica has expanded,SearchMedica.com to include a number ... conditions. SearchMedica.com was co-,developed with Convera Corporation ... , a,leading provider of vertical search services ... ), SearchMedica.com has been serving primary ...
... 24 An information technology,revolution is improving ... (PROs), according to Supportive Oncology Services, Inc. ... TN. PROs are self-,assessments that measure any ... from the patient without any interpretation by ...
Cached Biology Technology:Lucid's VivaScope(R) Reflective Confocal Microscope Approved for Sale in China 2Lucid's VivaScope(R) Reflective Confocal Microscope Approved for Sale in China 3CMPMedica Expands SearchMedica.com with Multiple Additional Vertical Search Applications co-developed with Convera(R) 2CMPMedica Expands SearchMedica.com with Multiple Additional Vertical Search Applications co-developed with Convera(R) 3Patient-Reported Outcomes (PROs) Improve Cancer Treatment -- Experts Agree 2Patient-Reported Outcomes (PROs) Improve Cancer Treatment -- Experts Agree 3
...
...
...
... Radiolabeled Ligands\n\nReceptor-related research has long been enabled ... ligands selected to keep pace with new ... products and services for receptor research and ... If you do not find exactly what ...
Biology Products: