Navigation Links
Sediment yields climate record for past half-million years
Date:6/15/2009

ctica," he said. "The record is virtually the same regardless of the location."

Surprisingly, Rashid's team was also able to score another first with their analysis of this sediment core a record of the temperature at the sea surface in the North Atlantic.

They drew on knowledge readily known to chemists that the amount of magnesium trapped in calcite crystals can indicate the temperatures at which the crystals formed. The more magnesium present, the warmer the waters were when the tiny organisms were alive.

They applied this analysis to the remains of the benthic organisms in the cores and were able to develop a record of warming and cooling of the sea surface in the North Atlantic for the last half-million years.

Having this information will be useful as scientists try to understand how quickly the major ocean currents shifted as glacial cycles came and went, Rashid said.

The researchers were also able to gauge the extent of the ancient Laurentide Ice Sheet that covered much of North America during the last 130,000 years.

As that ice sheet calved off icebergs into the Atlantic, Rashid said that the "dirty underbelly" of those icebergs carried gravel out into the ocean. As the bergs melted, the debris fell to the bottom and of the ocean floor. The more debris present, the more icebergs had been released to carry it, meaning that the ice sheet itself had to have been larger.

"Based on this, we've determined that the Laurentide Ice Sheet was probably largest during the last glacial cycle than it was during any of the three previous cycles," he said.

During the last glacial cycle, the Laurentide Ice Sheet was more than a kilometer (.6 miles) thick and extended to several miles north of Ohio State.


'/>"/>

Contact: Harunur Rashid
rashid.29@osu.edu
614-292-5040
Ohio State University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Soil and sediment contamination assessment more accurate
2. Ultra-fine coatings on sediment grains influence nitrate and sulfate storage in soil
3. Sedimentary records link Himalayan erosion rates and monsoon intensity through time
4. Paleozoic sediment curve provides new tool for tracking sea-floor sediment movements
5. Cataloguing invisible life: Microbe genome emerges from lake sediment
6. UNH researchers test sediment-scrubbing technology in NH river
7. Smithsonian study: Sediment prediction tools off the mark
8. Hot springs microbes hold key to dating sedimentary rocks, researchers say
9. Research yields potential target for cancer, wound healing and fibrosis
10. Greatest thing since sliced bread: New data offer important clues toward improving wheat yields
11. Mixing genomics and geography yields insights into life and environment
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/6/2015)... Calif. , Aug. 6, 2015  Today, ... will visit Crossmatch ™ to learn firsthand ... and protect data. Crossmatch is a world leader ... technologies and expertise are helping federal agencies and ... and security.   "The vast majority ...
(Date:8/5/2015)... Transparency Market Research has released ... Global Industry Analysis, Size, Share, Growth, Trends and Forecast ... is forecast to reach US$ 2,671.8 Mn by 2022. ... systems by civil and government agencies. This is majorly ... activities across the globe that would elevate the demand ...
(Date:8/3/2015)... , Aug. 3, 2015 Synaptics, Inc. (Nasdaq: ... solutions, today announced that members of the executive management ... Pacific Crest Global Technology Leadership Forum on Tuesday, August ... will be held at the Sonnenalp Resort in ... presentation may include forward-looking information. An audio webcast of ...
Breaking Biology News(10 mins):Rep. Honda to Visit Crossmatch in Redwood City 2Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 2Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 3Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 4Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 5Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 6
... that are high in protein and cereal grains produce an ... excretion and weaken bones, according to a new study accepted ... Endocrinology & Metabolism ( JCEM ). The study found ... pill or through a diet rich in fruits and vegetables ...
... Savannah River Site in South Carolina, there are five ... No, they,re not crop circles carved by aliens. ... Biologists at Washington University in St. Louis and their ... Florida, and the University of Washington have created these ...
... Purdue University have developed a technique that uses ... tiny particles within seconds, representing a potential new ... using nanoassembly. The technique, called rapid electrokinetic ... because the patterns can be more quickly and ...
Cached Biology News:Calcium and vitamin D may not be the only protection against bone loss 2Study on wildlife corridors shows how they work over time 2Study on wildlife corridors shows how they work over time 3Study on wildlife corridors shows how they work over time 4New holographic method could be used for lab-on-a-chip technologies 2New holographic method could be used for lab-on-a-chip technologies 3New holographic method could be used for lab-on-a-chip technologies 4
(Date:8/28/2015)... ... ... initial launch of FireflySci Inc. (FFS) in early 2015, the company continues to shake up ... the Fonz in a lab coat and Large Marge have been posted on the company’s ... , FireflySci is proud to be the only cuvette manufacturer is the world that has ...
(Date:8/27/2015)... , ... August 27, 2015 , ... Capital Edge ... complex business problems, is pleased to announce their ranking as one of the top ... of the fastest-growing private companies across the nation. , “It is truly an honor ...
(Date:8/27/2015)... TORONTO , Aug. 27, 2015 /PRNewswire/ - ... Securities Exchange: PBT.U), and Biohaven Pharmaceutical Holding Company ... in a Phase I study of BHV-0223, a ... application (IND) regarding BHV-0223 and recently obtained clearance ... to proceed with human testing. Portage holds 54% ...
(Date:8/27/2015)... 27, 2015  Asterias Biotherapeutics, Inc. (NYSE MKT: AST), ... regenerative medicine, today announced that executives from the company ... of September.  , Pedro Lichtinger ... Renshaw,s 17th Annual Global Investment Conference on Wednesday, September ... Regis Hotel in New York City ...
Breaking Biology Technology:Cuvette Manufacturer FireflySci Launches Back to School Deals with Complimentary Shipping On All Orders 2Capital Edge Consulting Makes Inc. 5000 List of America’s Fastest-Growing Private Companies 2Capital Edge Consulting Makes Inc. 5000 List of America’s Fastest-Growing Private Companies 3Portage's Biohaven doses first human subject in Phase 1 trial with lead drug candidate BHV-0223 2Portage's Biohaven doses first human subject in Phase 1 trial with lead drug candidate BHV-0223 3Portage's Biohaven doses first human subject in Phase 1 trial with lead drug candidate BHV-0223 4Asterias Biotherapeutics to Present at Upcoming Investor Conferences 2
... Va., Jan. 26, 2012  ZyGEM Corp. Ltd., a developer ... DNA and other nucleic acids, today announced that it ... (SDL) for ZyGEM,s DNA and RNA extraction kits.  SDL ... Research Centre (KFSH&RC) as part of the Saudi Arabian ...
... by researchers at the RIKEN Omics Science Center (OSC) ... 40 minutes and with one hundred times the sensitivity ... 2010 confirms the new technique accurately identified the 2009 ... 24 hours after fever onset, much faster than standard ...
... 2012 Sequenom, Inc. (NASDAQ: SQNM ) today ... shares of its common stock, including 1,950,000 shares sold pursuant ... to the underwriters. All of the shares were offered by ... share. The gross proceeds to Sequenom from this offering were ...
Cached Biology Technology:ZyGEM to Provide its Unique DNA and RNA Extraction Technology to Middle East Biomedical Innovator Saudi Diagnostics Ltd. 2ZyGEM to Provide its Unique DNA and RNA Extraction Technology to Middle East Biomedical Innovator Saudi Diagnostics Ltd. 3Clinical technique sets new standard for speed in battle to prevent pandemic infection 2Sequenom Announces Exercise in Full of Over-Allotment Option and Completion of Public Offering of Common Stock 2Sequenom Announces Exercise in Full of Over-Allotment Option and Completion of Public Offering of Common Stock 3
Rabbit polyclonal to Esa1 ( Abpromise for all tested applications)....
Sirtuin 7 (SIRT7) Rabbit anti-Human Polyclonal Antibody Immunogen: Synthetic peptide - KLH conjugated Family: Other Recommended Storage: Long term: -20C; Short term: +4C...
... Microarrays designed for RNA aptamer screening ... flexible and powerful Paraflo microfluidic on-chip synthesis ... of our comprehensive DNA/RNA Aptamer Microarray Service. ... 2-OMe RNA Aptamer Microarray contains greater than ...
... for RNA aptamer screening and binding optimization ... Paraflo microfluidic on-chip synthesis platform. Thousands of ... on-chip and LC Sciences can provide assistance ... available as part of our comprehensive DNA/RNA ...
Biology Products: