Navigation Links
Sandy beaches, hydrocarbon reservoirs, tectonic tilting: It's all about geology
Date:6/29/2012

itute of Technology, Pasadena, California 91125, USA. Posted online 29 June 2012; doi: 10.1130/G33093.1.

The most extreme climate transitions in Earth history are recorded by Neoproterozoic glacial deposits with overlying "cap" carbonate rocks indicating a potential snowball, or ice-entombed, Earth. Giant symmetrical wave ripples preserved within these rocks are often interpreted to form under extreme wave conditions. Using a new model for ripple formation, we show that the first-order control on forming this type of ripple is sediment size, not wave climate. New measurements of ripple wavelengths and particle sizes from the approx. 635 million-year-old Nuccaleena Formation, Australia, indicate that the giant ripples are generally composed of coarse to very coarse sand, indicating that they likely formed under normal wave conditions. Numerical simulations of flow over ripples suggest that the ripples may have formed over long time periods with variable wave climates in conjunction with rapid seabed cementation. Together our analysis indicates that, rather than extreme wave conditions, the giant wave ripples are a consequence of the unusual mode of carbonate precipitation during this unusual period of Earth history.


Influence of drainage divide structure on the distribution of mountain peaks

James A. Spotila, Department of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, USA. Posted online 29 June 2012; doi: 10.1130/G33338.1.

People have long been fascinated by mountainous topography, yet peaks and ridges have been left at the periphery of scientific investigation of landscape evolution, which traditionally has focused on valley-shaping processes. Author James Spotila shows that the distribution of mountain peaks conforms closely with drainage divide structure. Specifically, peaks occur along the intersection of drainage divides, and are not randomly distributed throughout the landscape. This is likely because dra
'/>"/>

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

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

Related biology news :

1. A new vision for harnessing data about life on Earth
2. NIST launches new website to educate industry about alternatives to mercury thermometers
3. New discoveries about severe malaria
4. Purdue professor to speak before Congress about nanotechnology in brain treatment research
5. Study raises questions about use of anti-epilepsy drugs in newborns
6. Fruit flies provide new knowledge about uninhibited cell growth
7. Analysis raises atmospheric, ecologic and economic doubts about forest bioenergy
8. Whats in a surname? New study explores what the evolution of names reveals about China
9. Consumers need simple, concise messages about benefits of phytonutrients
10. Expedition to undersea mountain yields new information about sub-seafloor structure
11. New discoveries about brain-hand connection sought to improve therapies, treatments, prosthetics
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/15/2014)... The German Gauß-Allianz has admitted Johannes Gutenberg University ... the Rhineland-Palatinate science hub continues to maintain a ... computing. , "The acceptance of Johannes Gutenberg ... Gauß-Allianz is a milestone in the national and ... support. The state of Rhineland-Palatinate can be proud ...
(Date:10/15/2014)... Geneticist Fred Alt will be awarded the 44th Rosenstiel ... University for his pioneering research exploring the mechanisms of ... and cancer cells. Alt is the second alumnus to ... the Nobel Prize in 2003. , Alt is the ... Genetics at Harvard Medical School and an investigator at ...
(Date:10/14/2014)... ATHENS, Ohio (Oct. 14, 2014)—It,s been millions of years ... but a team led by Ohio University scientists is ... to model airflow through dinosaur snouts. The research has ... not only breathe but to enhance the sense of ... pretty ,nosy, animals," said Ohio University doctoral student Jason ...
Breaking Biology News(10 mins):Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member 2Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member 3Brandeis awards 44th Rosenstiel Award to pioneering geneticist Fred Alt 2Dinosaur breathing study shows that noses enhanced smelling and cooled brain 2Dinosaur breathing study shows that noses enhanced smelling and cooled brain 3
... daily recommended dosages of ibuprofen and acetaminophen caused a ... quadriceps muscle mass and muscle strength gained during three ... physiologists at the Human Performance Laboratory, Ball State University. ... working with Dr. Todd Trappe, reported study results at ...
... Laboratory will host the inaugural conference of the ... create a virtual center in cyberspace for plant ... "Bringing Plant and Computing Scientists Together to Solve ... 7-9, 2008, will take the first steps in ...
... As the saying goes, some people are born with ... at least one species of the animal world, according ... Alberta. A study of female red squirrels in ... as food availability and spring temperature experienced between birth ...
Cached Biology News:Ibuprofen or acetaminophen in long-term resistance training increases muscle mass/strength 2iPlant Kickoff Conference at CSHL begins tackling plant biology's grand challenges 2iPlant Kickoff Conference at CSHL begins tackling plant biology's grand challenges 3
(Date:10/25/2014)... (PRWEB) October 24, 2014 SonaCare ... focused ultrasound (HIFU) technology, announced that its Board ... as Chief Executive Officer, President and member of ... Dr. Carol will take-on expanded responsibilities within the ... as well as overseeing commercialization, manufacturing and finance. ...
(Date:10/25/2014)... 25, 2014 Berkshire Corporation, the ... to announce the release of the ValuSeal® IonX™ ... of contamination containment in critical processing applications. , ... higher cleanroom environments, ValuSeal® IonX™ is a laser ... wiper that continues Berkshire’s innovative focus on meeting ...
(Date:10/25/2014)... and NEW YORK ... Inc. (OTCQB: ACCPD), formerly Access Pharmaceuticals, Inc. (ACCP), ... areas, announced it has implemented a 1-for-50 reverse ... opening of trading on Friday, October 24, 2014. ... basis under new CUSIP number 72754H109 and temporary ...
(Date:10/25/2014)... LONDON , October 24, 2014 ... CytRx Corporation (NASDAQ: CYTR ), Vertex Pharmaceuticals ... (NASDAQ: ALXN ), Peregrine Pharmaceuticals Inc. (NASDAQ: ... Free research on these five companies can be accessed ... on Thursday, October 23, 2014, ended on a positive ...
Breaking Biology Technology:SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 2SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 3Ions Are Bygones, Berkshire Announces the Release of New Innovative Cleanroom Wipers 2PlasmaTech Biopharmaceuticals, Inc. Announces Reverse Stock Split, Ticker Change and Launches New Corporate Website 2Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 2Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 3Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 4Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 5
MAb to Vasopressin Preservative: NaN3...
... Anti-AP-2 α, clone 8G8/5 GenBank Accession ... made human AP-2alpha/gamma fusion protein corresponding to ... 278-450 of human AP-2γ Formulation: 0.1M Tris-glycine, ... before the addition of glycerol to 30% ...
Mouse monoclonal [1C6/2] to Rad17 ( Abpromise for all tested applications). entrezGeneID: 5884 SwissProtID: Q9UPF5...
MMP-2 / MMP-9 Inhibitor IV is a potent, selective, slow binding and mechanism based inhibitor of human gelatinases. • Molecular weight: 306.4 • Molecular Formula: C(15)H(14)O(3)S(2). &bul...
Biology Products: