Pleistocene planktonic foraminifera at ODP Site 128-798 ...

• Main Author: Kheradyar, Tara
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1992
• Subjects: Composite Core; Drilling/drill rig; Leg128; Joides Resolution; Ocean Drilling Program ODP; Neogloboquadrina pachyderma; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.771226; https://doi.pangaea.de/10.1594/PANGAEA.771226

ODP Site 798 on the Oki Ridge in the Southern Japan Sea yielded the first continuous and well-preserved record of Pleistocene planktonic foraminifers in the Northwestern Pacific Ocean region. Quantitative analysis of planktonic foraminifers completed for 122 samples from the 200-m-thick Pleistocene section cored at ODP Site 798 provides a proxy record of variations in sea-surface temperature, productivity, and circulation during the past 1.6 m.y. in an area beneath the track of the Tsushima Current. Faunal census data allow recognition of five distinct assemblages: (1) type A assemblages dominated by sinistrally coiling forms of Neogloboquadrina pachyderma representing polar-subpolar surface temperatures, (2) type B assemblages dominated by Globigerina bulloides and thought to represent periods of increased surface productivity and upwelling, (3) type C assemblages marked by significant abundances of dextrally coiling forms of N. pachyderma thought to represent the warm transitional waters of the Tsushima ... : Supplement to: Kheradyar, Tara (1992): Pleistocene planktonic foraminiferal assemblages and paleotemperature fluctuations in Japan Sea, Site 798. In: Pisciotto, KA; Ingle, JCJr.; von Breymann, MT; Barron, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 127/128(1), 457-470 ...