PLANKTONIC FORAMINIFERA AS PALEOENVIRONMENTAL PROXIES OF UPPER QUATERNARY SEDIMENTATION IN THE OKHOTSK SEA

Romanova A.V., Cherepanova M.V., Gorbarenko S.A.

Tikhookeanskaya geologiya 2014; 33(1): 89-101

Planktonic foraminifera were studied from Pleistocene-Holocene sediment core 936 in the Central Okhotsk Sea. Five complexes of planktonic foraminifera were determined corresponding to five marine isotope stages (MIS) that have been previously established for this core. The peculiar features of paleoassemblages formed under specific paleogeographic conditions were identified. A sharp increase in foraminifera abundance is observed in ‘warm” MIS 1. The main criterion for interglacial MIS 3 is fluctuation of Globigerina bulloides and Globigerina quinqueloba frequency. The highest abundances of Neogloboquadrina pachyderma sin are established for «cold» MIS 2 and MIS 4.

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