Isotopic measurements of 3 foraminifer species from ODP Hole 171-1050C ...

Analysis of 944 single specimens of three species of late Maastrichtian planktonic foraminifera (Racemiguembelina fructicosa, Contusotruncana contusa, and Rugoglobigerina rugosa) from 38 samples spanning the last 3 Myr of the Cretaceous shows consistent isotopic trends through time, consistent isoto...

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Bibliographic Details
Main Authors: Isaza-Londoño, Carolina, MacLeod, Kenneth G, Huber, Brian T
Format: Dataset
Language:English
Published: PANGAEA 2006
Subjects:
Sample code/label
DEPTH, sediment/rock
Racemiguembelina fructicosa, δ13C
Racemiguembelina fructicosa, δ18O
Contusotruncana contusa, δ13C
Contusotruncana contusa, δ18O
Rugoglobigerina rugosa, δ13C
Rugoglobigerina rugosa, δ18O
Sea surface temperature
Drilling/drill rig
DSDP/ODP/IODP sample designation
Isotope ratio mass spectrometry
Leg171B
Joides Resolution
Ocean Drilling Program ODP
North Atlantic
Planktonic foraminifera
Online Access:https://dx.doi.org/10.1594/pangaea.742669
https://doi.pangaea.de/10.1594/PANGAEA.742669
Description
Summary:Analysis of 944 single specimens of three species of late Maastrichtian planktonic foraminifera (Racemiguembelina fructicosa, Contusotruncana contusa, and Rugoglobigerina rugosa) from 38 samples spanning the last 3 Myr of the Cretaceous shows consistent isotopic trends through time, consistent isotopic differences among taxa, and high within-sample isotopic variability throughout. Within-sample variability does not change systematically through time for any taxon, but average d18O values decrease by approx. 1.5 per mill, and average d13C values diverge up section. Comparing taxa, average d18O values are similar within most samples, but average d13C values generally decrease from R. fructicosa to R. rugosa to C. contusa. In addition, the within-sample variability of individual d13C measurements is larger for R. fructicosa than for either C. contusa or R. rugosa, an observation which is consistent with a photosymbiotic habitat for R. fructicosa. In terms of Maastrichtian paleoceanography the negative d18O ... : Supplement to: Isaza-Londoño, Carolina; MacLeod, Kenneth G; Huber, Brian T (2006): Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales. Paleoceanography, 21(1), PA1012 ...

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