(Table 1) Late Pleistocene planktonic foraminifera of Hole 302-M0004C ...

Planktonic foraminifera populations were studied throughout the top 25 meters of the IODP ACEX 302 Hole 4C from the central Arctic Ocean at a resolution varying from 5cm (at the top of the record) to 10cm. Planktonic foraminifera occur in high absolute abundances only in the uppermost fifty centimet...

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Bibliographic Details
Main Authors: Eynaud, Frédérique, Cronin, Thomas M, Smith, Shannon A, Zaragosi, Sebastien, Mavel, J, Mary, Yannick, Mas, Virginie, Pujol, Claude
Format: Dataset
Language:English
Published: PANGAEA 2009
Subjects:
DEPTH, sediment/rock
Sample code/label
Depth, composite top
Neogloboquadrina pachyderma sinistral
Neogloboquadrina pachyderma dextral
Number
Neogloboquadrina atlantica
Globigerina quinqueloba
Globigerina bulloides
Biogenic indeterminata
Foraminifera, planktic
Sample type
Split
Intercore correlation
Counting >125 µm fraction
split
Exp302
CCGS Captain Molly Kool Vidar Viking
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP
Arctic
Arctic Ocean
Foraminifera*
Neogloboquadrina pachyderma
Planktonic foraminifera
Online Access:https://dx.doi.org/10.1594/pangaea.672078
https://doi.pangaea.de/10.1594/PANGAEA.672078
Description
Summary:Planktonic foraminifera populations were studied throughout the top 25 meters of the IODP ACEX 302 Hole 4C from the central Arctic Ocean at a resolution varying from 5cm (at the top of the record) to 10cm. Planktonic foraminifera occur in high absolute abundances only in the uppermost fifty centimetres and are dominated by the taxa Neogloboquadrina pachyderma. Except for a few intermittent layers below this level,most samples are barren of calcareous microfossils.Within the topmost sediments, Neogloboquadrina pachyderma specimens present large morphological variability in the shape and number of chambers in the finalwhorl, chamber sphericity, size, and coiling direction. Five morphotypeswere identified among the sinistral (sin.) population (Nps-1 to Nps-5), including a small form (Nps-5) that is similar to a non-encrusted normal form also previously identified in the modern Arctic Ocean watermasses. Twenty five percent of the sinistral population is made up by large specimens (Nps-2, 3, 4), with a maximal ... : Supplement to: Eynaud, Frédérique; Cronin, Thomas M; Smith, Shannon A; Zaragosi, Sebastien; Mavel, J; Mary, Yannick; Mas, Virginie; Pujol, Claude (2009): Morphological variability of the planktonic foraminifer Neogloboquadrina pachyderma from ACEX cores: implications for late Pleistocene circulation in the Arctic Ocean. Micropaleontology, 55(2-3), 101-116 ...

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