Navigation Links
Mafic melts, methane seeps, 2 million waves, foreign magma, and the invisible hand
Date:4/11/2012

dakitic in composition. Our data indicate that adakites in SW Japan are not related to melting of an eclogitic subducting slab at unusually high temperatures, but instead to melt evolution in the lower overriding crust in the presence of residual garnet, the stability of which increases as water contents of parental melts decrease. Lower crustal melt evolution at reduced water contents likely represent a unifying process for generating adakitic signatures in all tectonic settings that have previously been considered to enhance slab melting (subduction of young slabs, shallow subduction, or subduction of slab edges or windows). The results presented here by Zellmer and colleagues demonstrate that magmatic water plays a key role in the differentiation of arc magmas in modern and ancient subduction settings.


Stromatolite lamination frequency, Walker Lake, Nevada: Implications for stromatolites as biosignatures

Victoria A. Petryshyn et al., Dept. of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA. Posted online ahead of print 10 April 2012; doi: 10.1130/G32675.1.

Lamination in stromatolites (considered some of the oldest fossils on Earth) is commonly interpreted to record the periodic response of a microbial community to daily, seasonal, or perhaps yearly environmental forcing. This study by Victoria A. Petryshyn and colleagues uses high-resolution carbon-14 dating of Holocene stromatolites from Walker Lake (Nevada, USA) to construct a record of lamination rate over the course of accretion. The stromatolite lamination rates are found to form on a variable, multi-year time scale that closely tracks lake level and local climate factors (e.g., El Nio Southern Oscillation), suggesting that climate and lake geochemistry had a larger influence on lamination formation than did microbial communities. While it is clear that some modern and ancient stromatolites are built in response to a microbial-pa
'/>"/>

Contact: Christa Stratton
cstratton@geosociety.org
Geological Society of America
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9

Related biology news :

1. Methane may be answer to 56-million-year question
2. Methane gas from cows -- the proof is in the poo
3. Science paper argues against conclusion that bacteria consumed Deepwater Horizon methane
4. BU researchers identify extensive methane leaks under streets of Boston
5. Researchers ID microbe responsible for methane from landfills
6. Measuring methane
7. UCSB, Texas A&M scientists find methane gas concentrations have returned to near-normal levels
8. Freshwater methane release changes greenhouse gas equation
9. Milestone: A methane-metal marriage
10. Methane-powered laptops may be closer than you think
11. RIT scientist shines laser light on methane in pursuit of clean fuel
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/20/2014)... The National Institutes of Health has awarded the Oklahoma ... continue its research on anthrax and the bacteria,s effects ... Mark Coggeshall, Ph.D., and his colleagues have studied the ... NIH,s Cooperative Centers for Human Immunology. The original funding ... 17 on the heels of the terrorist attacks of ...
(Date:8/20/2014)... of sunscreen and seawater signals a relaxing trip to ... idyllic beach vacation comes with an environmental hitch. When ... sea, they can become toxic to some of the ... many other marine animals. Their study appears in the ... Antonio Tovar-Sanchez and David Snchez-Quiles point out that other ...
(Date:8/20/2014)... rugs and plastic bags could one day be made ... petroleum, scientists are now reporting. The novel process they ... deal with its agricultural and plastic waste problems, appear ... Athanassiou, Ilker S. Bayer and colleagues at the Italian ... constantly growing. In 2012, its production reached 288 million ...
Breaking Biology News(10 mins):$14.5 million grant awarded to continue anthrax studies 2
... A 3D scan of one of the new catfish ... researchers from Mexico and the United States has identified a ... The paper detailing the discovery has been published in Zootaxa, ... Lacantuniidae and named the species Lacantunia enigmatica. It becomes the ...
... vital passage through a bacterium's outer cell wall will ... the 'wrong' material, scientists at The University of Texas ... has long-term implications for understanding diseases caused by misfolded ... cow disease. , The paper in today's Journal of ...
... of a wide range of physiological and behavioral processes, ... patterns. While it's well known that circadian clock elements ... known about how daily temperature cycles affect the clock's ... PLoS Biology , Kajori Lahiri, Nicholas Foulkes, and ...
Cached Biology News:Researchers identify new catfish family 2Beyond genes: Lipid helps cell wall protein fold into proper shape 2Beyond genes: Lipid helps cell wall protein fold into proper shape 3Temperature regulates circadian clock in zebrafish 2
(Date:8/21/2014)... On Wednesday of last week RENU 28, the world's ... became available for purchase in Australia and New Zealand, and ... 28 works is, if you think about the definition of ... cellular renewal within your body. If you think about the ... cellular renewal. What RENU 28 does is it works with ...
(Date:8/20/2014)... succeeded in measuring vibrational motion of a single molecule ... vibration of a single molecule differs from the behaviour ... performed at the University of California, Irvine, where post-doctoral ... as a visiting fellow under professor Vartkess A. Apkarian, ... was lead by Professor Eric O. Potma. The results ...
(Date:8/20/2014)... -- PAREXEL International Corporation (NASDAQ: PRXL ) announced ... Healthcare Conference in New York.  Ingo Bank , ... making a presentation on PAREXEL and discussing business developments ... A live webcast of the discussion will ... at www.PAREXEL.com in the Upcoming Events portion ...
(Date:8/20/2014)... health of your heart, researchers have discovered. , A ... TENS machine like those designed to relieve labour pains ... raised flap at the front of the ear immediately ... changed the influence of the nervous system on the ... failing hearts too hard. , Professor Jim Deuchars, Professor ...
Breaking Biology Technology:RENU 28 Skin Care Now Available in Australia and New Zealand 2Seeing a molecule breathe 2PAREXEL International To Present At Baird Healthcare Conference 2'Tickling' your ear could be good for your heart 2
... Internet routers are the source of problem , ,Madison, ... were infected with the latest e-mail virus last week. At ... 2003, UW-Madison discovered that it was the recipient of a ... one of the campus' public Network Time Protocol (NTP) servers. ...
... The announcement that TechStar will receive a two-year grant ... sign that research institutions in Milwaukee, which for years ... the marketplace, are aspiring to catch up. Thats good ... the Wisconsin economy. , ,If Milwaukee wants to transform ...
... in the field and navigating at the helm of several ... (which is located in Woodridge, Ill. across from Argonne ... advance his drug discovery company. , ,Following a six-month ... the next few weeks with financial adviser Legg Mason ...
Cached Biology Technology:Flawed Routers Flood UW Server 2Flawed Routers Flood UW Server 3Milwaukee research institutions step up the pace for technology transfer 2Advanced Life Sciences to Hit the Road For $30 Million in Funding 2Advanced Life Sciences to Hit the Road For $30 Million in Funding 3Advanced Life Sciences to Hit the Road For $30 Million in Funding 4
... been developed for use with immunohistochemical ... nonspecific background staining due to endogenous ... peroxidase with hydrogen peroxide. This ... with additional novel components to further ...
Anti-Human Factor XI Purified (Polyclonal) (sheep IgG)...
Formulation: 10mM PBS/500 mM NaCl, 0.09% NaN3, pH 7.2...
Rad51B...
Biology Products: