HOME >> BIOLOGY >> NEWS
Oldest Ice Core From The Tropics Recovered, New Ice Age Evidence

niversity, the Russian Academy of Sciences and ORSTOM in Ecuador. In 1997, the team scaled Sajama, a 21,463-foot (6,542-meter) extinct volcano towering over the Bolivian Altiplano, a vast plateau that covers 79,151 square miles (205,000 square kilometers) of Bolivian desert.

They used a solar-powered drill to bore through the ice cap at the summit and retrieve two cores -- 434.3 feet (132.4 meters) and 435.6 feet (132.8 meters) -- that reached to bedrock. Both cores contain a record of ancient climate trapped in the ice that reaches back to the formation of the ice cap. The team also retrieved two additional shorter cores as well.

An analysis of the cores showed the following:

The ice at the bottom of both cores dates back 25,000 years into the coldest period of the last ice age -- the last glacial maximum (LGM). The abrupt beginning and end of a Younger-Dryas-type event suggest that atmospheric processes as the probable driving mechanisms. It also indicates that the natural climate system is capable of large-magnitude shifts on a global scale.

(The Younger-Dryas was a severe cooling period that began around 12,700 years ago -- right in the middle of the major warming that followed the last glacial stage. It lasted only 1,300
'"/>

Contact: Lonnie Thompson
thompson.3@osu.edu
614-292-6531
Ohio State University
3-Dec-1998


Page: 1 2 3 4 5

Related biology news :

1. Oldest evidence for processing of wild cereals: starch grains from barley, wheat, on grinding stone
2. Oldest known evidence of cat taming found in Cyprus, researchers report in Science
3. Oldest-known arm bone found in Pennsylvania
4. Oldest crystal reveals early Earth
5. Earlier water on Earth? Oldest rock suggests hospitable young planet
6. Flatworms Are Oldest Living Ancestors To Those Of Us With Right And Left Sides, Reported In The 19 March Issue Of Science
7. Chinese And US Scientists Identify The Worlds Oldest Flowering Plant
8. Worlds Oldest Known Fossil Reptile Nests Discovered In Arizonas Petrified Forest
9. American Museum Of Natural History Researchers Announce Discovery Of Oldest Known Fossil Ants - 92-Million-Year-Old Fossils Found In New Jersey Amber
10. Evidence builds for potential new cancer drug target
11. Evidence for sympatric speciation by host shift in the sea

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/25/2019)... ... September 25, 2019 , ... LeadingBiotech , ... dialogue, today announces its inaugural South CEO conference to be held ... , Co-produced by Tulane University, this invitation-only meeting convenes biopharma executives to discuss ...
(Date:9/24/2019)... (PRWEB) , ... September 24, 2019 , ... ... its technology driven portfolio of 3D porous titanium spinal implants with the expansion ... Ti3D implant offerings while more than tripling the number of cervical and lumbar ...
(Date:9/22/2019)... ... September 20, 2019 , ... ... are adjusting to client demands for precision medicine products. The report, Lab ... $19 billion in 2018, the pharma/bio sector is the largest source of demand ...
Breaking Biology News(10 mins):
(Date:10/3/2019)... ... 02, 2019 , ... Rapid Novor, Inc., the world's leader ... has moved into a new, 5000 sqft, purpose-built, state-of-the-art facility. Now home to ... company's continuous commitment to quality research and service offerings. , The ...
(Date:9/24/2019)... ... September 24, 2019 , ... ... delivery technologies, development, and manufacturing solutions for drugs, biologics, gene therapies, and ... company focused on the development of therapies to treat central nervous system ...
(Date:9/17/2019)... ... September 17, 2019 , ... Catalent, a ... and Clinical Supplies Management, Asia Pacific (APAC) will present at the upcoming 3rd ... Sept. 25-26, 2019. , On Thursday, Sept. 26, at 10:10 a.m., Ms. Delaney ...
(Date:9/17/2019)... , ... September 16, 2019 , ... ... via CNBC on Saturday, September 21st @11:00am ET. Check local listings for more ... Ltd. (Credo Biomedical), a molecular diagnostic company from Singapore dedicated to developing ...
Breaking Biology Technology:
Cached News: