| PALEOCEANOGRAPHY |
Maastrichtian Foraminiferal Stable Isotope Data- Rio Grande Rise
|
|
Frank, T.D., and M.A. Arthur. 1999. Tectonic forcings of Maastrichtian ocean-climate evolution. Paleoceanography 14(2):103-117.
| Data Coverage |
North: 48.92 * South: -30.42 |
|
West: -76.12 * East: -12.17 |
|
Altitude: -2665 m |
Start Year: 71400000 14C yr BP
* End Year: 65060000 14C yr BP
Data: Please Cite Data Contributors!
|
|
Summary: A global compilation of deep-sea isotopic records suggests that Maastrichtian ocean-climate evolution was tectonically driven.
During the early Maastrichtian the Atlantic intermediate-deep ocean was isolated from the Pacific, Indian, and Southern Oceans;
deep water formed in the high-latitude North Atlantic and North Pacific. At the early/late Maastrichtian boundary a major
reorganization of oceanic circulation patterns occurred, resulting in the development of a thermohaline circulation system
similar to that of the modern oceans. A combination of isotopic and plate kinematic data suggests that this event was triggered
by the final breaching of tectonic sills in the South Atlantic and the initiation of north-south flow of intermediate and
deep water in the Atlantic. The onset of Laramide tectonism during the mid Maastrichtian led to the concurrent draining of
major epicontinental seaways. Together, these events caused cooling, increased latitudinal temperature gradients, increased
ventilation of the deep ocean, and affected a range of marine biota.
More Info on Paleoceanography Data |
|
|
Parameters: delta C13 PDB (Gavelinella sp.); delta C13 PDB (Rugoglobigerina rotundata); delta O18 PDB (Rugoglobigerina rotundata); delta O18 PDB (Nuttalides sp.); delta O18 PDB (Gavelinella beccariiformis); delta C13 PDB (Pseudotextularia elegans); delta O18 PDB (Nuttalides truempyi); delta C13 PDB (Nuttalides truempyi); delta C13 PDB (Pseudotextularia ultimatudima); delta C13 PDB (Nuttalides sp.); delta O18 PDB (Pseudotextularia elegans); delta O18 PDB (Gavelinella sp.); radiocarbon years before 1950AD; delta O18 PDB (Pseudotextularia ultimatudima); delta C13 PDB (Gavelinella beccariiformis)
|
|
Complete XML Record: noaa-ocean-2565
(Last Revised: 2007-12-21 )
|
|
 |
DOC/NOAA/NESDIS/NCDC (National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce )
325 Broadway, E/CC23
Boulder, CO 80305
USA
|
| http://www.ncdc.noaa.gov/paleo/ |
| E-mail: bruce.a.bauer@noaa.gov |
| E-mail: paleo@noaa.gov |
Phone: 303-497-6280
Fax: 303-497-6513
|
|
