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SUMMARY:New approaches in reconstructing the oxygen isotopic composition o
 f  the ocean over Earth history - S. Turchyn Earth Sciences
DTSTART:20090528T103000Z
DTEND:20090528T113000Z
UID:TALK18217@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:The oxygen isotope ratio measured in carbonate skeletons of fo
 ssilized  organisms provides our primary repository of paleoclimatological
  and  temperature reconstructions over the course of Earth history. Howeve
 r\,  this calculation assumes a knowledge of the oxygen isotope ratio of  
 the ocean\, and the geochemical record remains ambiguous as to whether  or
  not this ratio has evolved over time.  I will present two new  geochemica
 l tools I have used to explore secular variability in the  oxygen isotope 
 ratio of the ocean through the Phanerozoic (the last  550 million years).
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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