(Table 3) Projected ages of radiolarian events of DSDP Hole 57-440B in the western North Pacific@en

Ages were obtained from age/depth plots based on diatom, foraminifer, calcareous nannofossil and magnetostratigraphic events年代数据取自基于硅藻（diatom）、有孔虫（foraminifer）、钙质超微化石（calcareous nannofossil）及磁地层事件（magnetostratigraphic events）建立的年龄-深度剖面（age/depth plots）。