Stable isotope ratios of benthic and planktonic foraminifera from Miocene to Pliocene sediments of DSDP Hole 7-62A on the Eauripik Rise, Pacific Ocean (Table 1), supplement to: Resig, Johanna M; Kroopnick, Peter M (1983): Isotopic and distributional evidence of a planktonic habitat for the foraminiferal genus Streptochilus Brönnimann and Resig, 1971. Marine Micropaleontology, 8(3), 235-248
Oxygen and carbon isotope analyses show that the biserial forarniniferal genus Streptochilus, which was originally described from pelagic sediments on the Eauripik Rise and Ontong Java Plateau, lived deep in the upper water column within the oxygen minimum layer. The species of Streptochilus average...
Main Authors: | , |
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Format: | Dataset |
Language: | English |
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PANGAEA - Data Publisher for Earth & Environmental Science
1983
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Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.682292 https://doi.pangaea.de/10.1594/PANGAEA.682292 |
Summary: | Oxygen and carbon isotope analyses show that the biserial forarniniferal genus Streptochilus, which was originally described from pelagic sediments on the Eauripik Rise and Ontong Java Plateau, lived deep in the upper water column within the oxygen minimum layer. The species of Streptochilus average from 4 to 19% of the foraminiferal assemblages in which benthic forms compose less than 1 or 2%. Specimens of Streptochilus are selectively dissolved when in contact with the bottom water mass. Their rapid evolutionary turnover of less than a few million years and their wide areal distribution in the equatorial Indo-Pacific are indicative of planktonic foraminifera. Aside from usefulness of the species of Streptochilus as stratigraphic indices, these Neogene biserial planktonic foraminifera are potential indices of paleoceanographic stratification. : Ages are approximated, Temperature calculation: T (∞C) = 16.5-4.3 * (deltaO18 O3) + 1.4 * (deltaO18 O3)**2, based on the revised paleotemperature equation of Epstein et al. (1953) |
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