Navigation Links
November GEOLOGY and GSA TODAY Media Highlights
Date:11/5/2007

d shed new light on the long-term ecological influence of mass extinctions on the distribution and diversity of marine communities.


Sustained sulfide oxidation by physical erosion processes in the Mackenzie River basin: Climatic perspectives
Damien Calmels et al., Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK. Pages 1003-1006.

The chemical weathering of rocks is tightly coupled to the global carbon cycle because the dissolution of atmospheric carbon dioxide (CO2) in surface water is a main weathering agent of rock minerals. Dissolved weathering products as well as dissolved atmospheric carbon are transported by rivers to the ocean, where they combine to form carbonate deposits, trapping atmospheric CO2 for long periods of time. Although research into weathering has long focused on the role of CO2, there are other weathering agents that may disturb this carbon regulation loop. In addition to dissolved CO2, acidity of the Mackenzie River (one of the largest rivers in the world), Canada, is caused by sulfuric acid from the oxidation of sulfide minerals in the rocks underlying the catchment. Calmels et al. have shown that this mechanism contributes 60% of the river acidity, making sulfuric acid the most important weathering agent. Moreover, they have shown that its role increases with the intensity of physical erosion. In contrast to reactions involving CO2, the chemical weathering of rocks by sulfuric acid affects the global carbon cycle through the transitory release of CO2 from continental carbonate rocks to the atmosphere. In the Mackenzie River basin, weathering reactions are not a sink, but rather a source of CO2 to the atmosphere. If generalized, this conclusion may have interesting climatic perspectives.


New insights into the genesis of Indian kimberlites from the Dharwar Craton via in situ Sr isotope analysis of groundmass perovskite
Chad Paton et al., University of Melbourne,
'/>"/>

Contact: Ann Cairns
acairns@geosociety.org
303-357-1056
Geological Society of America
Source:Eurekalert

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

Related biology news :

1. First IEEE-USA Innovation Forum coming to Washington area in November
2. Media highlights in the November issues of Biophysical Journal
3. Highlights from the November 2007 Journal of the American Dietetic Association
4. September Geology and GSA Today media highlights
5. October Geology and GSA Today media highlights
6. Heart of Herschel to be presented to media
7. Last chance for media to register for ECCO 14 -- the European Cancer Conference
8. Highlights from the September 2007 Journal of the American Dietetic Association
9. AGU journal highlights -- Sept. 6, 2007
10. IDEMA Reveals Program Highlights for DISKCON USA 2007
11. IDEMA Reveals Program Highlights for DISKCON USA 2007
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/19/2014)... a lemur. It,s not an African Bush Baby or even ... and downright "cool" primate from Southeast Asia. , "It,s really ... Rafe Brown, curator-in-charge at the University of Kansas, Biodiversity Institute. ... furry body; a long tail with a furry tuft at ... look a bit like the disks on the digits of ...
(Date:8/19/2014)... Some infants born with neonatal abstinence syndrome ... more difficult time going through withdrawal than others, ... While genetic and epigenetic (when genes are turned ... as potential factors, researchers at Boston University School ... conducted a first of its kind study to ...
(Date:8/19/2014)... has ever had a glass of fizzy soda knows ... But in a finding with wide industrial applications, Princeton ... particles down into the liquid as well. , "It ... so we were surprised, and fascinated, to discover that ... process injected tiny oil droplets into the water," said ...
Breaking Biology News(10 mins):Philippine tarsier gets boost from Kansas research, and genetic proof of a new variety 2Philippine tarsier gets boost from Kansas research, and genetic proof of a new variety 3In-utero methadone, Subutex exposure could alter gene expression, cause severe Neonatal Abstience Syndrome 2Bubbling down: Discovery suggests surprising uses for common bubbles 2Bubbling down: Discovery suggests surprising uses for common bubbles 3
... National Physical Laboratory (NPL), the UK,s National Measurement Institute, ... soft tissue injuries such as muscle strains and ligament ... is used in physiotherapy to accelerate healing of tissue ... to the treatment site, but it is well-known that ...
... have used the papyrus sedge for millennia. The Ancient Egyptians ... boats, it is grown for ornamentation and parts can even ... Environmental Technology and Management , researchers in Uganda have demonstrated ... and other noxious residues from abattoir effluent. Robinson Odong, ...
... UC Davis scientists has found that a product resulting from ... off the supply of oxygen and nutrients that fuel tumor ... report their discovery in the Proceedings of the National ... was a collaboration among multiple UC Davis laboratories and Harvard ...
Cached Biology News:Measuring ultrasound for better treatment of muscle injuries 2Papyrus plant detox for slaughterhouses 2Fatty acid metabolite shows promise against cancer in mice 2Fatty acid metabolite shows promise against cancer in mice 3
(Date:8/18/2014)... Global HIV Infection Drug Market and Pipeline Insight ... of HIV infection and the number of deaths due to ... rate across the globe. It has been estimated that the ... in 2013, with the rates for children being even much ... infection rates has been the improved access to antiretroviral drugs ...
(Date:8/18/2014)... , August 18, 2014 ... Bioreactor Systems Market, By Application (Municipal Wastewater Treatment ... Flat Sheet and Multi Tubular), By Configuration (Internal/Submerged ... 2019", published by MarketsandMarkets, The market for membrane ... by 2019, growing at a CAGR of 15.28% ...
(Date:8/18/2014)... Fla. , Aug. 18, 2014 ... biotechnology company whose patented and proprietary technologies are ... other proteins for the bioenergy, bio-based chemical, biopharmaceutical ... has filed a Registration Statement on Form 10 ... "SEC"). Logo - http://photos.prnewswire.com/prnh/20110621/CL06708LOGO ...
(Date:8/18/2014)... 18. August 2014 Vier führende ... internationale klinische Studie auf, in der eine ... soll das Sehvermögen bei allen Entfernungen verbessern, ... möglicherweise keine Lese- oder Gleitsichtbrille mehr benötigen. ... FluidVision Accommodating Intraocular Lens (FluidVision ...
Breaking Biology Technology:Global HIV Infection Drug Market Overview 2Global HIV Infection Drug Market Overview 3Global HIV Infection Drug Market Overview 4Membrane Bioreactor Systems Market Worth $2,927 Million by 2019 2Membrane Bioreactor Systems Market Worth $2,927 Million by 2019 3Dyadic International Files Form 10 Registration Statement 2Dyadic International Files Form 10 Registration Statement 3Dyadic International Files Form 10 Registration Statement 4Implantation einer revolutionären akkommodativen Linse bei Katarakt-Patienten in deutschen Augenzentren im Rahmen einer internationalen klinischen Studie 2Implantation einer revolutionären akkommodativen Linse bei Katarakt-Patienten in deutschen Augenzentren im Rahmen einer internationalen klinischen Studie 3Implantation einer revolutionären akkommodativen Linse bei Katarakt-Patienten in deutschen Augenzentren im Rahmen einer internationalen klinischen Studie 4
... a combination of careful theoretical modeling and precise micro-manufacturing, ... new type of ultra-thin, self-adhesive electronics device that can ... and muscle activity all without the use of ... have created a new class of micro-electronics with a ...
... TBIO) today reported financial results for the three and six ... Second Quarter Financial ResultsNet sales for the second quarter ... compared with $5.1 million for the same period in 2010. ... sales, compared with gross profit of $2.5 million or 49 ...
... Md., Aug. 11, 2011 The American College of ... ACMG Online Live Learning Center , which will ... care professionals. This valuable, on-demand resource brings the latest ... learning offerings such as the Genetics Review Course and ...
Cached Biology Technology:Stick-on tattoos go electric 2Stick-on tattoos go electric 3Transgenomic Reports Second Quarter Financial Results 2Transgenomic Reports Second Quarter Financial Results 3Transgenomic Reports Second Quarter Financial Results 4Transgenomic Reports Second Quarter Financial Results 5Transgenomic Reports Second Quarter Financial Results 6Transgenomic Reports Second Quarter Financial Results 7Transgenomic Reports Second Quarter Financial Results 8Transgenomic Reports Second Quarter Financial Results 9ACMG Announces New Online Live Learning Center: Will Bring Genetics and Genomics Education to Varied Health Professionals 2
Mouse/Rat WNK1 Affinity Purified Polyclonal Ab...
Recalibration of HL-2000-CAL products...
The Zymo-Spin PI Fast-Spin column features durable polypropylene construction and is the same column featured in the His-Spin Protein Miniprep. Capacity is 800 l....
LAL Chromogenic Endpoint assay...
Biology Products: