Planktonic foraminiferal assemblages of the Paleocene-Eocene Thermal Maximum of ODP Hole 113-690B ...

High-resolution study of Antarctic planktonic foraminiferal assemblages (Ocean Drilling Program Site 690, Weddell Sea) shows that these microplankton underwent a stepwise series of changes during the Paleocene–Eocene thermal maximum (PETM). Initiation of this response coincides with the onset of the...

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Bibliographic Details
Main Author: Kelly, Daniel Clay
Format: Dataset
Language:English
Published: PANGAEA 2002
Subjects:
DEPTH, sediment/rock
Foraminifera, planktic
Morozovella spp.
Acarinina praepentacamerata
Acarinina mckannai
Acarinina nitida
Acarinina subsphaerica
Acarinina coalingensis
Acarinina soldadoensis
Acarinina spp.
Alabamina wilcoxensis
Chiloguembelina trinitatensis
Subbotina patagonica
Subbotina spp.
Parasubbotina varianta
Globanomalina australiformis
Drilling/drill rig
Counting >180 µm fraction
Leg113
Joides Resolution
Ocean Drilling Program ODP
Antarc*
Antarctic
Planktonic foraminifera
Weddell Sea
Online Access:https://dx.doi.org/10.1594/pangaea.842889
https://doi.pangaea.de/10.1594/PANGAEA.842889
Description
Summary:High-resolution study of Antarctic planktonic foraminiferal assemblages (Ocean Drilling Program Site 690, Weddell Sea) shows that these microplankton underwent a stepwise series of changes during the Paleocene–Eocene thermal maximum (PETM). Initiation of this response coincides with the onset of the carbon isotope excursion (CIE) but precedes the benthic foraminiferal mass extinction. The “top-to-bottom” succession in the biotic response indicates that the surface ocean/atmosphere was affected before the deep sea. The earliest stage of the faunal response entailed a conspicuous turnover within the shallow-dwelling genus Acarinina and a succession of stratigraphic first appearances. The genus Morozovella, large (>180 µm) biserial planktonics, and A. wilcoxensis are all restricted to the lower CIE within this PETM section. Acarininid populations crashed as the ocean/climate system ameliorated during the CIE recovery, reflecting atypical surface water conditions. This transient decline in acarininids is ... : Supplement to: Kelly, Daniel Clay (2002): Response of Antarctic (ODP Site 690) planktonic foraminifera to the Paleocene-Eocene thermal maximum: Faunal evidence for ocean/climate change. Paleoceanography, 17(4), 1071 ...

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