Oxygen- and carbon-isotopes of Globigerina bulloides and Neogloboquadrina pachyderma at DSDP Holes 80-548 and 80-549A ...

• Main Authors: Vergnaud-Grazzini, Colette, Saliège, Jean Francois
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1985
• Subjects: Deep Sea Drilling Project DSDP; Neogloboquadrina pachyderma
• Online Access: https://dx.doi.org/10.1594/pangaea.807761; https://doi.pangaea.de/10.1594/PANGAEA.807761

Oxygen- and carbon-isotope analyses have been performed on the Quaternary planktonic foraminifers of Sites 548 and 549 (DSDP Leg 80) to investigate major water mass changes that occurred in the northeastern Atlantic at different glacial-interglacial cycles and to compare them with the well-defined picture of 18,000 yr. ago. Oxygen-isotope stratigraphy also provides a chronological framework for the more important data on the fauna and flora. Although bioturbation and sedimentary gaps obliterate the climatic and stratigraphic record, general trends in the oceanographic history can be deduced from the isotopic data. Isotopic stratigraphy has tentatively been delineated down to isotopic Stage 16 at Site 548 and in Hole 549A. This stratigraphy fits well with that deduced from benthic foraminiferal d18O changes and with bioclimatic zonations based on foraminiferal associations at Site 549. Variations in the geographic extension and in the flux of the Gulf Stream subtropical waters are inferred from both d18O and ... : Supplement to: Vergnaud-Grazzini, Colette; Saliège, Jean Francois (1985): Pleistocene climatic changes in surface waters of the northeastern Atlantic: Oxygen and carbon isotopic compositions of planktonic foraminifers at Deep Sea Drilling Project Sites 548 and 549. In: De Graciansky, PC; Poag, CW; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Gov. Printing Office), 80, 793-803 ...