Navigation Links
Seafloor, sea-level, shear zones, subduction, sedimentation, and seismology
Date:1/14/2014

amical origins of seafloor spreading evolution were not available. For ancient times, a fundamental unknown is how seafloor spreading operates before the continents have reached their actual size. This study identifies the mechanisms of seafloor spreading evolution related to the growth of continents, making use of very recent and state-of-the-art 3D spherical dynamic models of convection in the mantle that produce plate-like tectonics. When continents grow, seafloor spreading becomes more active, the production of new seafloor increasing, along with its fluctuations. Because continental freeboard has remained close to its present-day value for two billion years, the results presented in this study reinforce the hypothesis that more than 90% of continental growth is restricted to the Hadean-Archean eons.


Crustal structure in southeastern Egypt: Symmetric thinning of the northern Red Sea rifted margins
Ahmed Hosny, Seismology Department, National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, Egypt, ahhosny2000@yahoo.com; and Andrew Nyblade, Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA. Posted online 10 January 2014, http://dx.doi.org/10.1130/G34726.1.

From the abstract: Crustal structure in southeastern Egypt has been investigated to elucidate the nature of crustal thinning across the northern Red Sea. P-wave receiver function modeling for seven stations in southeastern Egypt yields typical Proterozoic crustal thicknesses of 35 to 38 km around Lake Aswan, and thinner crust (25 to 26 km) within 50 km of the Red Sea coast. Vp/Vs ratios are on average 1.78 and indicate an intermediate composition crust. These results, when combined with other estimates of crustal thickness in the region, reveal a symmetric pattern of crustal thickness benea
'/>"/>

Contact: Kea Giles
kgiles@geosociety.org
Geological Society of America
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Related biology news :

1. Seismic zones, river deltas, landslides, fossil reptiles, and more new Geology science
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/16/2014)... you cannot lift your upper eyelid. You walk through life with ... they are rolled down in the eye socket. Obviously, such a ... their head. In order to correct this condition, one would need ... the April 16 print issue of the journal Neuron , ...
(Date:4/16/2014)... from the north-central U.S. and beyond will convene in ... science, expand on existing science, and explore the unique ... special emphasis on applied geology, paleontology, and mid-continent geology. ... Thursday by Dr. Kirk Johnson, Sant Director of the ...
(Date:4/16/2014)... , , Everything we do all of our movements, thoughts ... one another, and recent studies have suggested that some of ... known as astrocytes may be listening in on, or even ... study suggests that astrocytes might only be tuning in part ...
Breaking Biology News(10 mins):Researchers track down cause of eye mobility disorder 2Walking with mammoths and exploring mid-continental geology 2Walking with mammoths and exploring mid-continental geology 3Walking with mammoths and exploring mid-continental geology 4Eavesdropping on brain cell chatter 2Eavesdropping on brain cell chatter 3
... YORK , Dec. 3, 2013 Usernames and passwords ... public domains from unwarranted access. Yet, identity theft and corporate ... can be easily spoofed. Today, biometrics veteran Hector Hoyos ... aims to address and solve the issues of secure identity ...
... to the Arctic, as part of the Catlin Arctic Survey, ... just beneath the ocean surface are likely to battle for ... that copepods that move large distances, migrating vertically across a ... surviving. The increasing level of carbon dioxide in ...
... Arts and Sciences has developed a system of techniques ... a protected marine mammal habitat. The techniques are the ... Bulletin , focusing on the bottlenose dolphin population in ... in the Department of Biology, co-authored the article with ...
Cached Biology News:Hoyos Labs, a Digital Infrastructure Security Company, Launches; Rethinks How We Authenticate and Secure Identity 2Hoyos Labs, a Digital Infrastructure Security Company, Launches; Rethinks How We Authenticate and Secure Identity 3Arctic study shows key marine food web species at risk from increasing CO2 2SU biologist develops method for monitoring shipping noise in dolphin habitat 2
(Date:1/15/2014)... January 15, 2014 Look inside the ... items for the lab, from fluid handling to instruments ... to ship when you order. , Preferred Solutions ... , from the L/S® model for precise flow control ...
(Date:1/15/2014)... A study has been launched to test ... track could help to tackle the problem of obesity.  This ... GP surgery based in Stowmarket) and academics at University Campus ... Telemetry technology, which is inspired by equipment used to collect ...
(Date:1/15/2014)... 2013 was a banner year of continued innovation ... continued independent research led by the team at Wake ... million grant from the Susanne Marcus Collins Foundation, had ... reviewed journal, Amy Grant highlighted Brainwave Optimization® in First ...
(Date:1/14/2014)... 14, 2014 Carahsoft and CDS Federal ... 23, 2014 at 2pm EST (11am PST), “Natural Language ... focuses on how technology can turn raw, heterogeneous data ... government agencies. The online webinar will last approximately one ...
Breaking Biology Technology:Cole-Parmer Begins 2014 with the Release of Preferred Solutions 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2
... erect as many as five more buildings on its new ... well beyond its existing base of 2,500 employees, according to ... said the company anticipates adding 1,500 more individual offices, about ... addition, there remains plenty of room on the 380-acre Verona ...
... As we saw in the last article, 2006 was a good year ... We also saw that it was a mixed bag for the large-cap ... for these much more solid companies, then how was it for the ... look, the chart below is a reminder of the overall key market ...
... Wis. - A new $140 million biomedical research ... to executives of the Medical College of Wisconsin ... , ,With Gov. Jim Doyle and Milwaukee ... Medical College and the Children's Research Institute ...
Cached Biology Technology:Epic Systems will build well beyond current staff size 2A Midwest small-cap, life-science surprise package 2A Midwest small-cap, life-science surprise package 3A Midwest small-cap, life-science surprise package 4A Midwest small-cap, life-science surprise package 5Medical College dedicates $140M research facility 2
... HT is taking automated patch clamping to a ... ability to generate thousands of high quality data ... paradigms in ion channel drug discovery and safety ... quality afforded by conventional patch clamping can now ...
... mouse embryonic stem cells to dopaminergic neurons. ... where they are mainly located in the ... the retrorubral field. These dopaminergic (DA) neurons ... ( e.g.projections to the caudate nucleus, putamen ...
... RNA aptamer screening and binding optimization and ... microfluidic on-chip synthesis platform. Thousands of customer ... and LC Sciences can provide assistance with ... as part of our comprehensive DNA/RNA Aptamer ...
... synthetic peptide whose sequence is from the C-terminal end of the mouse ... from amino acids 429 to 448 of RAR*. The sequence of ... V - S - P - S - S - V - ... Q - S - P - L - L - Q ...
Biology Products: