Late Quaternary planktonic foraminifera of ODP Hole 175-1087A ...

• Main Authors: Giraudeau, Jacques, Pierre, Catherine, Herve, Laurence
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2001
• Subjects: Drilling/drill rig; Leg175; Joides Resolution; Ocean Drilling Program ODP; Neogloboquadrina pachyderma; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.735232; https://doi.pangaea.de/10.1594/PANGAEA.735232

Planktonic foraminiferal assemblages from the upper Pleistocene part of Hole 1087A (0 to 12.1 meters below seafloor) are investigated to assess the role of global and local climate changes on surface circulation in the southern Benguela region. The benthic stable isotope record indicates that the studied interval is representative of the last four climatic cycles, that is, down to marine isotope Stage (MIS) 12. The species assemblages bear a clear transitional to subpolar character, with Neogloboquadrina pachyderma (d), Globorotalia inflata, and Globigerina bulloides, in order of decreasing abundance, as the dominant taxa. This species association presently characterizes the mixing domain of old upwelled and open ocean waters, seaward of the Benguela upwelling cells. Abundance variation of the dominant foraminiferal species roughly follows a glacial-interglacial pattern down to MIS 8, suggesting an alternation of upwelling strength and associated seaward extension of the belt of upwelled water as a response ... : Supplement to: Giraudeau, Jacques; Pierre, Catherine; Herve, Laurence (2001): A late Quaternary, high-resolution record of planktonic foraminiferal species distribution in the southern Benguela region: Site 1087. In: Wefer, G., Berger, W.H., and Richter, C. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 175, 1-26 ...