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:12/10/2014)... -- Valencell, a leader in performance biometric data sensor technology, ... its licensees for highly accurate, clinically validated biometric technology. ... from fitness and health sectors, but first responders/military and ... only as useful as the biometric data it delivers. ... long-term mass consumer adoption of wearable products," said Dr. ...
(Date:12/5/2014)... 2014 Increased emphasis on product quality, ... testing and inspection technologies. The convergence of industries ... range of innovative test solutions. This trend is ... which is generally more inclined towards communication, media ... strategies of test equipment vendors will cater to ...
(Date:11/21/2014)... November 18, 2014 According to ... by Systems (Video, RFID, Access Control, Intrusion Detection, Parking ... Banks, Government), Component Service Geography - Global Forecasts to ... is projected to be around $25 Billion in 2014 ... growing at a CAGR of 8.69%. Browse ...
Breaking Biology News(10 mins):Wearable Technology Products Demand Highly Accurate Biometric Technology 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4Industrial Security Systems Market Worth $38 Billion by 2020 2Industrial Security Systems Market Worth $38 Billion by 2020 3
... to the national Centers for Disease Control and Prevention, 5 to ... with it. About 36,000 people will die. , But among health ... flu pandemic, such as a human strain of avian flu. And ... health crisis will come but when. Are we prepared? In a ...
... is believing, especially in medicine. From magnetic resonance ... of the body’s tissues and organs have become ... and make recommendations for effective treatment. ... Kent State University will provide doctors with a ...
... The skin’s ability to replace the tissue it sloughs off ... from Harvard Medical School published in the May 4 issue ... process not only for skin, but for many epithelial tissues ... epithelial stem cells turns out to be the p63 gene, ...
Cached Biology News:US control strategies may make flu epidemics worse, UCLA study shows 2Novel system developed to turn data into real-time, interactive 3-D images 2Master regulatory gene of epithelial stem cells identified 2
(Date:12/19/2014)... Charm Sciences is pleased to announce ... of Aflatoxin M1 in raw commingled milk is the ... validation. The peer reviewed report of the validation by ... Agricultural and Fisheries Research (ILVO-T&V) has been published by ... the most toxic aflatoxin and a known carcinogen, can ...
(Date:12/19/2014)... 19, 2014 Decision Resources Group finds that ... a 12 percent compound annual growth rate through 2023. ... population and the increasing adoption of dental implants. Growing ... will also spur demand for dental biomaterials because they ... periodontal treatments. Other key findings from Decision ...
(Date:12/19/2014)... ME (PRWEB) December 18, 2014 Ed ... director of the Center for Excellence in the Neurosciences ... New England, has been selected as a member of ... is the first neuroscientist from Maine to receive this ... nonprofit organization supported entirely by the Dana Foundation. ...
(Date:12/19/2014)... December 18, 2014 With only 2 ... special on Sartorius Biohit products . The product ... pipettes, Picus Electronic Pipette Trade-in Program, and free pipette ... Safety officers around the world. They are ideal for ... features include:, ,     Full volume range of ...
Breaking Biology Technology:Charm Sciences Achieves Independent Validation of First 15 Minute Quantitative Screening Method for Aflatoxin M1 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 3UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 2UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 3Major Pipette Distributor Pipette.com Announces Sartorius Year End Specials 2
... Recommends ,Do Not Vote, For Any of ... Shareholders of Biovail,Corporation (NYSE: BVF )(TSX: BVF) said today ... sharply criticized the incumbent board and,recommended ,Do Not Vote, for ... vote FOR two of the Concerned Shareholders,nominees, Joseph J. Krivulka ...
... Germany is on the,cutting edge in biotechnology R&D ... Companies located in Germany are poised to,profit from the ... expert panel, at the BIO International Convention (BIO 2008),in ... co-chaired the,panel along with the CEO of a major ...
... Part Of Georgetown University Hospital Arsenal Against ... ... Sciences (OTC,Bulletin Board: DSCI), a provider of advanced wound care products,announced ... Leptospermum Honey, has been used by clinicians at Georgetown,University Hospital,s Wound ...
Cached Biology Technology:Biovail Concerned Shareholders Welcome Glass Lewis Evaluation 2Biovail Concerned Shareholders Welcome Glass Lewis Evaluation 3BIO 2008: Germany on Cutting Edge in Biomanufacturing 2Derma Sciences MEDIHONEY(TM) Helps to Save Patient's Limb 2Derma Sciences MEDIHONEY(TM) Helps to Save Patient's Limb 3Derma Sciences MEDIHONEY(TM) Helps to Save Patient's Limb 4
Human plasmacytoid dendritic cells, BDCA-4+, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood Dendritic Cells and EPCs...
Umbilical cord blood basophils, For immunohistochemistry (IHC)...
Human peripheral blood CD8+ T cells, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood PBMC and T Cells...
Umbilical cord blood CD4+ T cells, For immunohistochemistry (IHC) Cell Chip with Human Umbilical Cord Blood MNCs and T Cells...
Biology Products: