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

th the conjugate margins of the northern Red Sea. Such a pattern is consistent with a pure shear model of extension, and suggests that the greater amounts of uplift and volcanism on the eastern side of the Red Sea compared to the western side may be the result of deeper flow in the mantle associated with the African superplume and not directly a consequence of the rifting process.


Incipient sediment motion across the river to debris-flow transition
Jeff P. Prancevic et al., California Institute of Technology, Division of Geological and Planetary Sciences, 1200 E. California Boulevard, MC 170-25, Pasadena, California 91125, USA; jprancev@caltech.edu. Posted online 10 January 2014, http://dx.doi.org/10.1130/G34927.1.

River channels steeper than 5% grade make up most of the drainage network in mountainous landscapes and are the source of devastating debris flows, yet little work has been done to understand how and when sediment moves in these channels. Jeff P. Prancevic and colleagues conducted a series of experiments in a laboratory model river to identify the critical conditions for sediment motion in steep channels and whether this motion occurs as normal river transport of single grains or en masse failure of a collection of grains. In their experiments, normal river transport becomes progressively less effective at moving sediment with increased grade and gives way to en masse failure at about 40% grade. This transition is predicted well by previous models that depend on the respective Mohr-Coulomb friction angles of individual grains and a collection of grains. Use of these models and knowledge of friction angles allows us to predict where the process transition is likely to occur in natural rivers, aiding efforts to mitigate damage by debris flows and improving our understanding of how mountains erode.



'/>"/>
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:7/24/2014)... Keryx Biopharmaceuticals, Inc. (Nasdaq:KERX) (the "Company") announced the publication ... 3 study of Zerenex (ferric citrate), the Company,s investigational ... hyperphosphatemia in patients with end-stage renal disease (ESRD) on ... with FErric CiTrate in EsrD) was published online today ... Nephrology ( JASN ). , This ...
(Date:7/24/2014)... species of fish, according to a new study ... tested fish anti-predator behaviour. , Three-spined sticklebacks ... when exposed to additional noise, whereas no effects ... author Dr Irene Voellmy of Bristol,s School of ... environments have increased substantially during the last few ...
(Date:7/24/2014)... A sake brewery has its own microbial terroir, meaning ... resemble those found in the product, creating the final ... the journal Applied and Environmental Microbiology . This ... census of a sake brewery. , Many sake ... author David A. Mills of the University of California, ...
Breaking Biology News(10 mins):Zerenex™ (ferric citrate) long-term Phase 3 study results published in JASN 2Zerenex™ (ferric citrate) long-term Phase 3 study results published in JASN 3Zerenex™ (ferric citrate) long-term Phase 3 study results published in JASN 4The microbes make the sake brewery 2
... Baylor College of Medicine (BCM) and the Puget Sound Blood ... small blood vessels of the heart and brain could cause ... clots. The scientists were surprised to find that the proteins ... five hours before returning to their normal, healthy shape. ...
... are the origins of life on Earth? A new ... building blocks of life could have been created on icy ... Chemists from the University of California, Berkeley, and the University ... of creating complex dipeptides linked pairs of amino acids ...
... discovered that deleting a specific gene in mice prevents them ... finding they believe may be replicated in humans. "When ... fat," said Prof. James McManaman, Ph.D., lead author of the ... the University of Colorado School of Medicine. "It may be ...
Cached Biology News:Stressed proteins can cause blood clots for hours 2Stressed proteins can cause blood clots for hours 3New evidence that comets could have seeded life on Earth 2Researchers discover gene that causes obesity in mice 2
(Date:7/25/2014)... 2014 At the request of the ... 60-day extension for the public comment period (Docket No. ... Model Aircraft established by Congress as part of the ... extension establishes the new deadline for comments as September ... Transportation/FAA notice published in the Federal Register on July ...
(Date:7/24/2014)... 24, 2014 Gain recognition for ... Chain of the biotech industry. Nominations are now ... brought to you by the Bio Supply ... supply chain management professionals for the past 7 ... of the Biotech industry – Manufacturers, Service Providers, ...
(Date:7/24/2014)... sophisticated equipment, trained personnel, and detection dogs to ... attacks. A revolutionary new electronic chip with nano-sized ... much easier. , The groundbreaking nanotechnology-inspired sensor, devised ... ,s School of Chemistry and Center for Nanoscience ... Tracense, picks up the scent of explosives molecules ...
(Date:7/24/2014)... to settle into equilibriuma state of unchanging balance ... of non-equilibrium conditions where new possibilities lie. Non-equilibrium ... such as temperature fluctuations, freezing and melting, or ... body temperature, airplanes to fly, and the Earth ... even though these conditions exist naturally and are ...
Breaking Biology Technology:FAA Grants Comment Extension at the Request of AMA 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 3Nano-sized chip 'sniffs out' explosives far better than trained dogs 2New approach to form non-equilibrium structures 2
... American Stock Exchange(R),(Amex(R)) today listed the common ... symbol RNN., Rexahn Pharmaceuticals is a ... discover, develop and commercialize,innovative treatments for cancer, ... unmet medical needs. Rexahn,s compounds are designed,to ...
... Judges for Nikon Small World, MELVILLE, N.Y., ... received a record number of entries for the ... by over 300,images. The oldest and most respected ... world,s best photomicrographers who create beautiful,imagery while showing ...
... Informed Medical Communications,(IMC), a leading provider of peer-to-peer ... appointment of Bert,Marchio to the position of Executive ... ), Marchio brings to IMC over 20 ... both the public and private sectors, with the ...
Cached Biology Technology:American Stock Exchange Lists the Common Stock of Rexahn Pharmaceuticals, Inc. 2Nikon Instruments Receives Record Number of Entries for Nikon Small World 2Informed Medical Communications Appoints New Chief Financial Officer 2
Mouse monoclonal [M7-PB-E9] to pan alpha Sodium Potassium ATPase ( Abpromise for all tested applications)....
Anti-Cohesin (Scc1/Rad21) Monoclonal Antibody Research Focus: signal transduction Storage: -20C Shipping Temperature: +4C...
Rabbit Anti-melatonin (different linkage) Polyclonal Antibody...
E2F2 protein...
Biology Products: