Navigation Links
Sierra Nevada rose to current height earlier than thought, say Stanford geologists
Date:4/23/2008

go any significant isotopic exchange with its environment. Thus, the trapped water becomes a reliable record of the isotopic composition of the water in the environment at the time the glass was deposited.

"It takes probably a hundred to a thousand years or so for these glasses to fully hydrate," Mulch said. But 1,000 years is the blink of an eye in geologic time and, for purposes of estimating the timing of events that occur on scales of millions or tens of millions of years, that degree of resolution is quite sufficient.

Likewise, you need deposits of volcanic ash that were laid down relatively quickly over a broad area. But that's the norm for explosive eruptions. Though some ash may circulate in the upper atmosphere for a few years after a major eruption, significant quantities are generally deposited over vast areas within days.

The samples they studied ranged from slightly more than 12 million years old to as young as 600,000 years old, a time span when volcanism was rampant in the western United States owing to the ongoing subduction of the Pacific plate under the continental crust of the North American plate.

"As we use these ashes that are present on either side of the mountain range, we can directly compare what the water looked like before and after it had to cross this barrier to atmospheric flow," Mulch said. "If you just stay behind the mountain range, you see the effect of the rain shadow, but you have to make inferences about where the water vapor is coming from, what happened to the clouds before they traveled across the mountain range.

"For the first time, we were able to document that we can track the [development of the] rain shadow on both sides of the mountain range over very long time scales."

Until now, researchers have been guided largely by "very good geophysical evidence" indicating that the range reached its present elevation approximately 3 or 4 million years ago, owing to major chang
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Simple screening questionnaire for kidney disease outperforms current clinical practice guidelines
2. New radar satellite technique sheds light on ocean current dynamics
3. Case researcher in RNA biology makes waves by challenging current thinking
4. Penn engineers create carbon nanopipettes that are smaller than cells and measure electric current
5. Recurrent genetic deletion linked to autism
6. Are current projections of climate change-impacts on biodiversity misleading?
7. Fossil data plugs gaps in current knowledge, study shows
8. A tall story: New research adds to growing body of knowledge of genetics of height
9. Satellites take sustainability to new heights
10. Study finds pitching mound height affects throwing motion, injury risk
11. Researchers uncover new piece to the puzzle of human height
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/31/2014)... emits over a wide part of the electromagnetic spectrum ... built in Lund, Sweden. The MAX IV facility presents ... together its component parts in a storage - ring ... a few hundred metres. Nevertheless, if these various challenges ... experiments that require source brightness and transverse coherence will ...
(Date:10/31/2014)... Ebola one important hurdle has just been cleared – ... of North Carolina at Chapel Hill and colleagues have ... be infected with Ebola and display symptoms similar to ... current issue of Science , will significantly improve ... desperately needed to curb the worldwide public health and ...
(Date:10/31/2014)...  HITLAB SM , a healthcare innovation and ... HITLAB Innovators Summit SM on December 1, ... partner with the Clinton Foundation,s Health Matters Initiative, ... Business School Alumni Club of New ... Operations Research, bringing together leaders in healthcare and ...
Breaking Biology News(10 mins):A new generation of storage -- ring 2Improved mouse model will accelerate research on potential Ebola vaccines, treatments 2HITLAB Announces Inaugural HITLAB Innovators Summit 2HITLAB Announces Inaugural HITLAB Innovators Summit 3
... PHILADELPHIA (December 8, 2013) According to Gertrude Stein, "A ... indicates that might not be the case when it comes ... collaborating institutions have found that as much as 30 percent ... any two individuals. This substantial variation is in turn reflected ...
... items to freezing temperatures may be a viable control option ... new study has found that bed bugs may be less ... article in the Journal of Economic Entomology called ... the authors describe how exposing bed bugs to freezing temperatures ...
... ORLEANS, December 7, 2013) Hematopoietic stem cell transplantation ... drug therapy for blood cancer, has become more accessible ... a result of major advances in transplant strategies and ... during the 55th American Society of Hematology Annual Meeting ...
Cached Biology News:Extensive variability in olfactory receptors influences human odor perception 2International gene therapy trial for 'bubble boy' disease shows promising early results 2International gene therapy trial for 'bubble boy' disease shows promising early results 3International gene therapy trial for 'bubble boy' disease shows promising early results 4International gene therapy trial for 'bubble boy' disease shows promising early results 5International gene therapy trial for 'bubble boy' disease shows promising early results 6International gene therapy trial for 'bubble boy' disease shows promising early results 7
(Date:10/30/2014)... , October 30, 2014 Investor-Edge ... Inc. (NYSE MKT: ONVO), Medivation Inc. (NASDAQ: ... Synthetic Biologics Inc. (NYSE MKT: SYN), and Ironwood Pharmaceuticals ... can be accessed at: http://investor-edge.com/register . ... at 4,549.23, down 0.33%, the Dow Jones Industrial Average ...
(Date:10/30/2014)... 29, 2014 Global polyvinyl chloride (PVC) ... economic crisis during 2008-2009, especially in North America and ... currently is keeping to a growing trend. , The ... utilized in the construction segment. In 2013, the key ... tubing, sheets and rigid film. Moreover, the PVC was ...
(Date:10/30/2014)... (PRWEB) October 30, 2014 On ... Cellular Medicine Showcase in Chicago, leading applied stem ... Surgeon, Dr. Wade McKenna presented talks on New ... Orthopedic Surgical Applications For Stem Cells. , Dr. ... membrane and the properties of AlphaGEMS that include: ...
(Date:10/30/2014)... CA (PRWEB) October 30, 2014 ... today that they have manually curated public data source ... non profit customers. the data is now available ... curates and unifies public and internal data sources for ... and knowledge out of the data that becomes more ...
Breaking Biology Technology:Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 2Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 4Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 5Global Polyvinyl Chloride Demand Is on Upward Trend Now, Says Merchant Research & Consulting in Its Topical Study 2Global Polyvinyl Chloride Demand Is on Upward Trend Now, Says Merchant Research & Consulting in Its Topical Study 3Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 2Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 3Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 4Rancho BioSciences Manually Curated TCGA Data Sets Available 2
... , , , , , , ... for nucleic acid amplification. For detailed information about a product , please ... Protector , RNase Inhibitor , , ... , is a new type of RNase ...
... , , , , , , ... size of template , Temperature optimum , Units needed for ... Rnase H activity , Combined RT and DNA Pol. , ... Expand Re- , verse Trans- , ...
... PCR that is as Flexible , as , ... , , , Choose the ... to meet your changing research needs. Central to the LightCycler , ... more than "Just another thermal cycler". It is a completely new integrated , ...
Cached Biology Technology:Product overview 2Product overview 3Product overview 4Product overview 5Product overview 6Product overview 7Properties of Reverse Transcriptases 2The LightCycler is the only System for Quantitative PCR that is as Flexible , as, You are! 2The LightCycler is the only System for Quantitative PCR that is as Flexible , as, You are! 3The LightCycler is the only System for Quantitative PCR that is as Flexible , as, You are! 4
Rat Cardiac Fibroblasts (RCF) (>500,000 cells)...
... Automation Buffer is a concentrated formulation of ... employing capillary action technology, as well as ... collaboration with David Brigati M.D., Department of ... This buffer is recommended for all the ...
...
... users requiring mass detection but not ... TOF Mass spectrometer is ideally suited ... for high performance mass analysis. ... analysis, protein detection, micro-satellite DNA characterization ...
Biology Products: