Navigation Links
University of Miami scientist uncovers miscalculation in geological undersea record
Date:9/10/2008

VIRGINIA KEY, Fla. -- The precise timing of the origin of life on Earth and the changes in life during the past 4.5 billion years has been a subject of great controversy for the past century. The principal indicator of the amount of organic carbon produced by biological activity traditionally used is the ratio of the less abundant isotope of carbon, 13C, to the more abundant isotope, 12C. As plants preferentially incorporate 12C, during periods of high production of organic material the 13C/12C ratio of carbonate material becomes elevated. Using this principle, the history of organic material has been interpreted by geologists using the 13C/12C ratio of carbonates and organics, wherever these materials can be sampled and dated.

While this idea appears to be sound over the last 150 million years or so, prior to this time there are no open oceanic sediment records which record the 13C/12C ratio, and therefore, geologists are forced to use materials associated with carbonate platforms or epicontinental seas. In order to test whether platform-associated sediments are related to the global carbon cycle, a paper by University of Miami Professor Dr. Peter K. Swart appears in the Proceedings of the National Academy of Sciences. This paper examines changes over the past 10 million years at sites off the Bahamas (Atlantic Ocean), the Maldives (Indian Ocean), and Great Barrier Reef (Pacific Ocean). The variations in the 13C/12C ratio are synchronous at all of the sites studied, but are unrelated to the global change in the 13C/12C ratio.

It appears that records related to carbonate platforms which are often used throughout the early history of the Earth are not good recorders of the 13C/12C ratio in the open oceans. Hence, the work presented suggests that assumptions made previously about changes in the 13C/12C ratios of carbonate sediments in the geological record are incorrect.

"This study is a major step in terms of rethinkin
'/>"/>

Contact: Barbra Gonzalez
barbgo@rsmas.miami.edu
305-421-4704
University of Miami Rosenstiel School of Marine & Atmospheric Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. A study by the MUHC and McGill University opens a new door to understanding cancer
2. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
3. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
4. Bioengineers at University of Pennsylvania devise nanoscale system to measure cellular forces
5. Binghamton University researchers investigate evolving malaria resistance
6. Antioxidant to retard wrinkles discovered by Hebrew University researcher
7. Society for General Microbiology 161st Meeting, University of Edinburgh
8. Boston University biomedical engineers find chink in bacterias armor
9. KAUST and American University in Cairo to collaborate on research and academic development
10. UNH becomes first university in nation to use landfill gas as primary energy source
11. University of Minnesota study refutes belief that black men have more aggressive prostate cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/16/2015)... , June 16, 2015 Fingerprint Cards ... fingerprint sensors in the company,s portfolio from one of its ... planned to mainly take place during the third quarter 2015. ... Asia . Jörgen Lantto, CEO of ...   the   growing interest from smartphone OEMs in integrating ...
(Date:6/15/2015)... YORK , June 15, 2015 ... today from Telstra reveals the majority of US consumers using ... them via biometrics, such as fingerprint and voiceprint, instead of ... According to Telstra,s " Mobile Identity   - ... " report, with smartphones now the primary channel used ...
(Date:6/11/2015)... , June 11, 2015 Daon, ... announced today that its IdentityX Mobile Authentication Platform ... IDentity Online) Alliance is an industry consortium launched ... standards for simpler, stronger authentication.  In order to ... pass a rigorous series of tests that measure ...
Breaking Biology News(10 mins):FPC Receives Order for Touch Fingerprint Sensors of 375 MSEK 2One in Four US Consumers Would Share Their DNA With Their Bank to Secure Financial and Personal Information, Telstra Report Finds 2One in Four US Consumers Would Share Their DNA With Their Bank to Secure Financial and Personal Information, Telstra Report Finds 3One in Four US Consumers Would Share Their DNA With Their Bank to Secure Financial and Personal Information, Telstra Report Finds 4Daon's IdentityX Mobile Authentication Platform One of First Products to be Certified by FIDO Alliance 2
... across thousands of miles of open ocean to locate their ... biologists for decades, and now a new study may offer ... study, scientists examined 56 years of fisheries data documenting the ... Columbia and the route they chose around Vancouver Island ...
... enables stem cells to become any cell-type in the body ... protein that kick-starts the process by which stem cells can ... liver or brain cells. Their discovery could help ... other cell types in the laboratory. These could then be ...
... (Jena) On their mission to the moon in 1969 ... famous footprints ever. Since the time the astronauts of the Apollo ... remain almost unchanged. And as no breath of wind will ever ... Not quite so old but equally ,immortal, are many traces ...
Cached Biology News:Salmon may use magnetic field as a navigational aid 2Salmon may use magnetic field as a navigational aid 3Waste dump at the end of the world 2Waste dump at the end of the world 3
(Date:7/1/2015)... 2015 InferMed , ... will augment ... clinical s olutions suite   Elsevier ... products and services, announced today the acquisition of  InferMed , ... technology company. InferMed,s Arezzo technology supports clinicians in ...
(Date:7/1/2015)... 1, 2015  UCB, a multinational biopharmaceutical company, ... leader in designing, transforming, and running intelligent business ... recognition of their close collaboration in driving transformation ... business services (GBS) finance organization. The ... that work together effectively to embrace the innovative ...
(Date:6/30/2015)... - Resverlogix Corp. ("Resverlogix") (TSX:RVX) announced today that ... approved the resolutions relating to: (i) a private ... at a price of $2.67 per unit (the ... one common share and 0.075358 common share purchase ... and (ii) the amendment to Resverlogix,s articles to ...
(Date:6/30/2015)... BOSTON , June 30, 2015  Juniper ... company focused on developing therapeutics that address unmet ... CFO George Elston will present at ... , Wednesday, July 8, 2015Time: , 4:45 PM ... NYWebcast (live & archive): , www.juniperpharma.com, under  ...
Breaking Biology Technology:Elsevier Acquires InferMed, Provider of Clinical Decision Support Technology 2Elsevier Acquires InferMed, Provider of Clinical Decision Support Technology 3Elsevier Acquires InferMed, Provider of Clinical Decision Support Technology 4UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 2UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 3UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 4UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 5Resverlogix Corp. Shareholders Approve Matters Relating to Licensing and Equity Arrangement 2Resverlogix Corp. Shareholders Approve Matters Relating to Licensing and Equity Arrangement 3Juniper Pharmaceuticals to Present at Cantor Fitzgerald Inaugural Healthcare Conference on July 8, 2015 2
... A faster tool for cell programming and a new way ... prizes of the 2009 Collegiate Inventors Competition, a program of ... Fund, the non-profit foundation of the global health care company ... Harris Wang, who invented a new way of cell ...
... Tolerx, Inc., a biopharmaceutical company developing novel therapies intended ... specifically modulating T-cell activity, today presented dose optimization data ... subjects with type 1 diabetes. Otelixizumab is a targeted ... 3 clinical study in subjects with new-onset autoimmune type ...
... tool for cell programming and a new way of allowing ... the 2009 Collegiate Inventors Competition, a program of the National ... non-profit foundation of the global health care company Abbott, and ... Wang, who invented a new way of cell programming at ...
Cached Biology Technology:Winners announced in 2009 Collegiate Inventors Competition 2Winners announced in 2009 Collegiate Inventors Competition 3Winners announced in 2009 Collegiate Inventors Competition 4Winners announced in 2009 Collegiate Inventors Competition 5Tolerx Presents Otelixizumab Phase 2 Dose Optimization Data At The IDF's 20th World Diabetes Congress 2Tolerx Presents Otelixizumab Phase 2 Dose Optimization Data At The IDF's 20th World Diabetes Congress 3Winners Announced in 2009 Collegiate Inventors Competition(R) 2Winners Announced in 2009 Collegiate Inventors Competition(R) 3Winners Announced in 2009 Collegiate Inventors Competition(R) 4Winners Announced in 2009 Collegiate Inventors Competition(R) 5Winners Announced in 2009 Collegiate Inventors Competition(R) 6Winners Announced in 2009 Collegiate Inventors Competition(R) 7
... innovation from Magnetofection technology, SilenceMag is ... available. Simple, rapid and easy to ... non toxic. Specifically designed for siRNA ... at very low doses of siRNA.,SilenceMag ...
... Many differences exist between the various commercial ... glass slide used, the length and GC ... and the manufacturing protocol employed all influence ... analysis. With all the different variables ...
... Feature Extraction Software reads and ... to prepare microarray data for ... * one 2-year license ... NFP/Academic accounts , * ...
... from the SMZ line is a Greenough stereomicroscope ... testing. It is available with a choice of ... space-saving compact base (N2GG). This microscope can be ... projector all at the same time giving you ...
Biology Products: