Bice, Karen L.; Huber, Brian T.; Norris, Richard D. (2003): Extreme polar warmth during the Cretaceous greenhouse? Paradox of the late Turonian delta (super 18) O record at Deep Sea Drilling Project Site 511. American Geophysical Union, Washington, DC, United States, Paleoceanography, 18 (2), georefid:2006-012273
Abstract:
Oxygen isotope data for upper Turonian planktonic foraminifera at Deep Sea Drilling Project Site 511 (Falkland Plateau) exhibit an excursion values coincident with the warmest tropical temperature estimates yet obtained for the open ocean. The lowest planktonic foraminifer delta (super 18) O values suggest that the upper ocean was as warm as 30-32 degrees C consistent with temperatures estimated from apparently coeval mollusc delta (super 18) O from nearby James Ross Island. Glassy textural preservation, a well-defined depth distribution in Site 511 planktonics, low sediment burial temperature, and lack of evidence of highly depleted pore waters argue against diagenesis as the cause of the very depleted planktonic values. (modified journ. abstr.)
Coverage:
West: -59.0000 East: -46.5818 North: -51.0017 South: -64.3000
West: NaN East: NaN North: NaN South: NaN
Relations:
Supplemental Information:
NSF Grants ATM-0000545 and EAR-9909658
Data access: