| dc.creator |
Jones, Tom Dunkley |
|
| dc.creator |
Bown, Paul R. |
|
| dc.creator |
Pearson, Paul N. |
|
| dc.creator |
Wade, Bridget S. |
|
| dc.creator |
Coxall, Helen K. |
|
| dc.creator |
Lear, Caroline H. |
|
| dc.date.accessioned |
2011-01-20T02:23:03Z |
|
| dc.date.available |
2011-01-20T02:23:03Z |
|
| dc.date.issued |
2008-10 |
|
| dc.identifier.citation |
Dunkley Jones, T., P. R. Bown, P. N. Pearson, B. S. Wade, H. K. Coxall, and C. H. Lear (2008), Major shifts in calcareous phytoplankton assemblages through the Eocene-Oligocene transition of Tanzania and their implications for low-latitude primary production, Paleoceanography, 23, PA4204, doi:10.1029/2008PA001640. |
en_US |
| dc.identifier.uri |
http://dx.doi.org/10.1029/2008PA001640 |
|
| dc.identifier.uri |
http://hdl.handle.net/1969.1/93228 |
|
| dc.description |
Copyright 2008 by the American Geophysical Union.
0883-8305/08/2008PA001640 |
en_US |
| dc.description.abstract |
A high-resolution record of exceptionally well preserved calcareous nannofossil assemblages from
Tanzania is marked by two key transitions closely related to the climatic events of the Eocene-Oligocene
transition (EOT). The first transition, at 34.0 Ma, precedes the first positive shift in d18O and coincides with a
distinct interval of very low nannofossil abundance and a cooling in sea surface temperatures (SST). The second,
at 33.63 Ma, is immediately above the Eocene-Oligocene boundary (EOB) and is associated with a significant
drop in nannofossil diversity. Both transitions involve significant reductions in the abundance of holococcoliths
and other oligotrophic taxa. These changes in calcareous phytoplankton assemblages indicate (1) a widespread
and significant perturbation to the low-latitude surface ocean closely tied to the EOB, (2) a potential role for
reduced carbonate primary production at the onset of global cooling, and (3) a significant increase in nutrient
availability in the low-latitude surface ocean through the EOT. |
en_US |
| dc.language.iso |
en |
en_US |
| dc.publisher |
American Geophysical Union |
en_US |
| dc.title |
Major shifts in calcareous phytoplankton assemblages through the Eocene-Oligocene transition of Tanzania and their implications for low-latitude primary production |
en_US |
| dc.type |
Article |
en_US |
| local.department |
Geology and Geophysics |
en_US |
Browse
