Navigation Links
August 2009 Geology and GSA Today media highlights
Date:7/31/2009

timony, tellurium, and lead, while copper-rich zones are depleted in these elements. These zones are interpreted to result from invasion of the pyrite-forming fluid by magmatic vapors. The close association of arsenic with gold and silver strongly suggests that these three elements may be transported by hydrothermal vapor separately from copper-rich vapor. Comparison of the analytical data to experimental studies of elemental partitioning, and analyses of fumaroles and fluid inclusions from magmatic-hydrothermal systems, suggests that the arsenic-rich vapor formed at high and possibly magmatic temperatures, whereas the copper-rich vapor formed at lower temperatures, possibly during migration of the original magmatic vapor.


Paradox of late Paleozoic glacioeustasy
Daniel E. Horton and Christopher J. Poulsen, Dept. of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA. Pages 715-718.

The ice age of the late Paleozoic (326-267 million years ago) was a period of dynamic climatic fluctuation, a time period in which southern Pangea saw the waxing and waning of massive continental ice sheets while low-latitude Pangean sedimentary sequences recorded multiple 100-m eustatic fluctuations. This cyclicity is thought to have been driven by changes in Earth's orbit with relation to the sun. Horton and Poulsen employ a coupled ice sheet-atmospheric general circulation model in an attempt to simulate both observed glacioeustatic changes and inferred ice sheet volumes. Their simulations present paradoxical results. While ice volumes of similar size to those implied by proxy evidence are simulated, sea-level changes brought about by cyclic variations in Earth's orbit are minuscule. It is only with large perturbations to atmospheric greenhouse gas concentrations that observed sea-level changes are simulated. Current geological evidence does not support such drastic greenhouse gas fluctuations, leaving the driving fact
'/>"/>

Contact: Christa Stratton
cstratton@geosociety.org
303-357-1093
Geological Society of America
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Related biology news :

1. USGS news: August science picks
2. August LabBits: A media tip sheet from the MBL in Woods Hole
3. AGU journal highlights -- August 6, 2008
4. Story tips from the US Department of Energys Oak Ridge National Laboratory, August 2008
5. Highlights from the August 2008 Journal of the American Dietetic Association
6. August 2008 Geology and GSA Today media highlights
7. BioScience tip sheet July/August 2008
8. Geoscientists meet to discuss Rocky Mountain geology
9. April 2009 Geology and GSA Today media highlights
10. February 2009 Geology and GSA Today media highlights
11. January GEOLOGY media highlights
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/7/2014)... associate professor, biomedical engineering, in the Grove School ... York, have identified a molecule that could lead ... aggressive forms of breast cancer. , Triple negative ... owing to aggressive proliferation and metastasis and a ... team, discovered the overexpression of intercellular adhesion molecule-1 ...
(Date:11/6/2014)... for a predator. Except when that predator runs so fast ... to its size, is the fastest creature on Earth. Some ... second (at about five miles per hour). The fastest human ... gold from the tiger beetle, a person would have to ... has a problem. At peak speeds, everything becomes a blur. ...
(Date:11/4/2014)... University of Utah engineers developed the first room-temperature fuel ... electricity without needing to ignite the fuel. These new ... off-grid power and sensors. , A study of the ... Society journal ACS Catalysis . , Fuel cells ... a fuel and an oxygen-rich source such as air. ...
Breaking Biology News(10 mins):The tiger beetle: Too fast to see 2Jet-fueled electricity at room temperature 2
... understand molecular mechanisms underlying various diseases, notably cancer, have ... of patients for the expression status of thousands of ... of each gene in the genome, measured as the ... Since each of the tens of thousands of genes ...
... essayist as we have."New York Times Book Review "Carl ... today. A Planet of Viruses is an important primer on ... other times shocking, and always accessible. Whether discussing the common ... oceans, or the world,s viral future as seen through our ...
... 5, 2011 In their eagerness to cut nitrogen ... of Mexico, people have often sought simple explanations for ... or farmers who apply too much fertilizer, which then ... research that examined phosphorus loading from all 1768 counties ...
Cached Biology News:Medusa-structure of gene regulatory network: Dominance of transcription factors in cancer subtypes 2Medusa-structure of gene regulatory network: Dominance of transcription factors in cancer subtypes 3Medusa-structure of gene regulatory network: Dominance of transcription factors in cancer subtypes 4A planet of viruses 2Study probes sources of Mississippi River phosphorus 2Study probes sources of Mississippi River phosphorus 3
(Date:11/26/2014)... The North America Thermal Protective Clothing Market ... analysis of the growth trends and revenue forecasts. ... by 2018, growing at a CAGR of 7.1% ... TOC of the North America Thermal Protective Clothing ... in-depth analysis and industry segmentation supported by various ...
(Date:11/26/2014)... On January, 14, 2015, UMBC’s ... D.C. science community to the UMBC campus for a ... the Protein Society, will take place from 9 a.m. ... Through discussion, presentations and workshops, the free symposium ... their role in the industry and the future of ...
(Date:11/26/2014)... Silicon Valley Electronic Data Capture (EDC) ... Alliance , provider of clinical research and data management ... addition to its CRO Partnership Program, Clinovo expands ... India. , “We have found Clinovo’s ClinCapture to ... platform which is both user friendly and easy to ...
(Date:11/26/2014)... SoundConnect , an award winning unified communications ... Darren Suders has joined the team as Director of ... partner program through innovative offerings, consistent partner ... brings more than 10-years of channel telecommunication experience to ... from policy development, to partner education and to expansion. ...
Breaking Biology Technology:The North America Thermal Protective Clothing Market is estimated to grow up to $616.3 million by 2018 - Report by MicroMarket Monitor 2The North America Thermal Protective Clothing Market is estimated to grow up to $616.3 million by 2018 - Report by MicroMarket Monitor 3RPM Alliance Joins Clinovo’s CRO Partnership Program, Further Strengthening Its Presence in Southern California and India 2SoundConnect Appoints Director of Channel Development & Sales 2
... Eric Schmidt, then the CTO of Sun Microsystems, gave ... language called Java. A thoroughly modern development platform for ... Java promised to ease programming headaches, the biggest of ... another. , ,Today, we can debate whether Java ...
... believes in reincarnation - in the business sense. , ,What ... reiterations of his company, Paragon Development Systems, Inc. , ... with a very important streak intact - 19 consecutive years ... a memory chip broker that managed to survive 20 years ...
... Madison, Wis. - Gov. Jim Doyle ... million in state funds for the development of renewable ... - which includes tax credits, low-interest loans, and grants ... the sale of state bonds - would leverage an ...
Cached Biology Technology:Java's undeniable impact on the Web 2Java's undeniable impact on the Web 3PDS survives with technological reinvention 2PDS survives with technological reinvention 3PDS survives with technological reinvention 4PDS survives with technological reinvention 5Doyle announces $80M renewable energy strategy 2Doyle announces $80M renewable energy strategy 3Doyle announces $80M renewable energy strategy 4
Contained in EZ-Tn5™ Kits and are available separately for sequencing of an insertion site....
Request Info...
Rabbit polyclonal to Syntrophin alpha 1 ( Abpromise for all tested applications). entrezGeneID: 6640 SwissProtID: Q13424...
Mouse monoclonal [4i97] to HLA Class 1 A25 ( Abpromise for all tested applications). Antigen: Full length protein (Human): HLA Class 1 Antigen-A25. Swiss Protein ID: P18462...
Biology Products: