Pushkar V.S., Cherepanova M.V., Likhacheva O.Yu.
Tikhookeanskaya geologiya 2013; 32(5): 51-65
A high-resolution diatom zonal scale has been developed on the basis of the stratigraphic diatom distribution in the Pliocene and Quaternary North Pacific deposits. The levels of the first evolutionary appearance and extinction of some diatom species are the base to establish zonal boundaries. Proposed diatom zones are traced in different facies of the North Pacific, mainly in the subarctic latitudes. The analysis of the diatom appearance and disappearance at the boundaries in the deposits of different biogeographic zones shows a space-temporal shift of these boundaries forced by the rates of the changes of paleopopulation densities and distribution areas during their expansion or degradation. This specification should be taken into account to provide the correlation between different biogeographical regions with specific features of the surface water masses.
