Navigation Links
New study shows how giant tortoises, alligators thrived in High Arctic 50 million years ago
Date:8/24/2010

a, Berkeley. The National Science Foundation funded the study.

"This is arguably the most comprehensive data set for the early Eocene High Arctic, and certainly explains how alligators and giant tortoises could live on Ellesmere Island some 52 to 53 million years ago," said Eberle, who also is the curator of fossil vertebrates at the University of Colorado Museum of Natural History.

During the Eocene, Ellesmere Island -- which is adjacent to Greenland -- probably was similar to swampy cypress forests in the southeastern United States today, said Eberle. Eocene fossil evidence collected there in recent decades by various teams indicate the lush landscape hosted giant tortoises, aquatic turtles, large snakes, alligators, flying lemurs, tapirs, and hippo-like and rhino-like mammals.

The bone and tooth enamel of vertebrate fossils contains biogenic apatite -- a mineral that is fossilized after the death of living organisms and which can be used as a "flight recorder" to infer paleoclimate conditions. Since all of the fossil materials were from the same stratigraphic layer and locality, the oxygen isotope ratios from the animals are linked to the temperatures of both ingested river water and precipitation at the time, allowing them to better estimate temperatures in the Eocene both annually and seasonally, she said.

"We use the water that the animals were drinking as a proxy for paleotemperature," said Eberle. "In mammal fossils, for example, we can analyze the oxygen isotope ratios in a sequence along the length of a large fossil tooth and estimate the warm-month and cold-month averages during the Eocene because teeth grow year round. When it comes to oxygen isotope values in tooth enamel, what we found for these creatures is that you are what you drink," she said.

The team looked at teeth from a large, hippo-like mammal known as Coryphodon, as well as bones from bowfin fish and shells and bones from aquatic turtles fro
'/>"/>

Contact: Jaelyn Eberle
jaelyn.eberle@colorado.edu
303-492-8069
University of Colorado at Boulder
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Long-term study shows effect of climate change on animal diversity
2. £2 million study to reveal workings of dementia genes
3. New study looks to define evangelicals and how they affect polling
4. CU-Boulder study suggests air quality regulations miss key pollutants
5. Researchers study acoustic communication in deep-sea fish
6. Study reveals homeowner perceptions in fire-prone areas
7. Researchers study how pistachios may improve heart health
8. Study: urban black bears live fast, die young
9. New study indicates link between weight gains during pregnancy and dieting history
10. Study reveals specific gene in adolescent men with delinquent peers
11. Sweat it out: UH study examines ability of sweat patches to monitor bone loss
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New study shows how giant tortoises, alligators thrived in High Arctic 50 million years ago
(Date:11/18/2014)... WASHINGTON , Nov. 18, 2014  The ... Security Industry Association today jointly announce the formation ... and release of its Identity and Biometric ... (Framework). The Framework received official support from BORDERPOL, ... governments to improve and provide expertise regarding border ...
(Date:11/18/2014)... The Parenteral Drug Association (PDA) today confirmed that ... and at least seven more will participate in the upcoming ... Hotel in Washington D.C. , Dec. 2-4. ... support from the regulatory agencies in the United ... our effort to help advance the use of metrics in ...
(Date:11/15/2014)...  While we may still be a few years away ... Trek" to gain instant access to all that ailed his ... and tablets for monitoring and measuring our health are cropping ... seem a tad Orwellian to some, but a new survey ... technological opportunities into their healthcare regime. These are ...
Breaking Biology News(10 mins):Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3FDA's Janet Woodcock, EMA's Emer Cooke Headline PDA Quality Metrics Conference 2Americans May Be Ready for a Brave New World of Healthcare 2Americans May Be Ready for a Brave New World of Healthcare 3Americans May Be Ready for a Brave New World of Healthcare 4
... led to enormous advancements in the scientific field. Through ... gain valuable knowledge about causative and preventative factors for ... the wider availability of such information also has a ... Researchers from Tel Aviv University and the Whitehead ...
... government invested more than $25 billion in health information ... and Recovery Act; yet, little is known about how ... Now, a University of Missouri nursing informatics expert suggests ... communication strategies among clinical staff, which allows staff to ...
... Researchers from the Polytechnic University of Catalonia have developed ... a technique called electroporation, which involves opening pores in ... like drugs and DNA. Current methods are aggressive and ... voltage electroporation with a small printed circuit board, which ...
Cached Biology News:A privacy risk in your DNA 2A privacy risk in your DNA 3Information Technology improves patient care and increases privacy, MU informatics expert says 2A Spanish breakthrough allows the electroporation of cell cultures for less than 1 Euro 2A Spanish breakthrough allows the electroporation of cell cultures for less than 1 Euro 3
(Date:11/26/2014)... November 25, 2014 The Pittcon marketing ... official conference and exposition mobile app, ... download in the App Store for iOS and Android ... resource tool before, during and after the event. It ... on exhibiting companies, technical sessions, Conferee Networking sessions and ...
(Date:11/26/2014)... DE (PRWEB) November 26, 2014 ... Heroes recognition reception on December 5, 2014, in San ... meeting. The MPN Heroes event will honor clinicians, caregivers, ... field of myeloproliferative neoplasms (MPNs). , Special guest ... discuss his family's cancer journey at the reception. ...
(Date:11/26/2014)... 2014 /PRNewswrie/ -- Theravalues Corporation annuncia con orgoglio il ... occasione di Hi Europe 2014 (dal 2 al 4 ... tratta della curcumina con la maggiore biodisponibilità di sempre, ... ingredienti approvati dalle norme europee. La curcumina ... curcumina ( Curcuma longa ) che è stata associata ...
(Date:11/24/2014)... 2014  Last week, Representatives Gus Bilirakis ... took a bold bipartisan step on behalf of ... Act. Original co-sponsors of the legislation include Representatives ... incentivize drug makers and innovators to "repurpose" major ... cancers, which opens the door to the development ...
Breaking Biology Technology:Pittcon Releases 2015 Mobile App 2CURE Magazine and Incyte to Honor MPN Heroes 2CURE Magazine and Incyte to Honor MPN Heroes 3CURE Magazine and Incyte to Honor MPN Heroes 4La curcumina con la maggiore biodisponibilità di sempre farà il suo debutto in Europa 2La curcumina con la maggiore biodisponibilità di sempre farà il suo debutto in Europa 3OPEN Act Introduced to Repurpose Drugs for Rare Diseases 2
... SCOTTSDALE, Ariz. , Feb. 4 A ... cancer care in community oncology practices revealed that Medicare covers ... providing related infusion room services to seniors with cancer. The ... planning, care coordination, and follow-up care planning -- are not ...
... ... , ... (Vocus) February 4, 2010 -- Qteros, Inc. , a leading developer of second-generation ... announced today that Mick Sawka has joined the company as Vice President, Business Development, ...
... RESEARCH TRIANGLE PARK, N.C. , Feb. 4 ... orally available antiviral therapeutics, announced today that Gwendolyn Powell ... Medical Officer.   , Dr. Painter has more than 20 ... clinical development, clinical safety and pharmacovigilance, and occupational and environmental ...
Cached Biology Technology:Study: Medicare Covers Only Half the Cost of Administering Chemotherapy to Seniors with Cancer 2Study: Medicare Covers Only Half the Cost of Administering Chemotherapy to Seniors with Cancer 3Study: Medicare Covers Only Half the Cost of Administering Chemotherapy to Seniors with Cancer 4Biofuels Technology Leader Qteros Names Mick Sawka Vice President, Business Development 2Biofuels Technology Leader Qteros Names Mick Sawka Vice President, Business Development 3Chimerix Names Wendy Painter, M.D., M.P.H., as Chief Medical Officer 2Chimerix Names Wendy Painter, M.D., M.P.H., as Chief Medical Officer 3