Ages at DSDP Site 86-577

A synthesis of paleomagnetic and calcareous nannofossil stratigraphies for the sedimentary sequences recovered at Deep Sea Drilling Project (DSDP) Site 577 on the Shatsky Rise is presented. Numerical ages are estimated for a series of nannofossil datum levels from the late Maestrichtian to middle Eocene period ( about 68 to about 52 m.y. ago) and the late Cenozoic (last about 5 m.y.). Absolute age control is obtained on the basis of the revised geomagnetic polarity time scale of. […]

本文呈现了针对萨茨基海隆（Shatsky Rise）深海钻探计划（Deep Sea Drilling Project, DSDP）577站位所获取沉积序列的古地磁与钙质超微化石地层学综合分析结果。研究估算了晚马斯特里赫特期至中始新世（约68至约52百万年前）以及晚新生代（距今约5百万年）内一系列钙质超微化石基准面的数值年龄。本次研究基于经修订的地磁极性年表[...]获得了绝对年龄控制依据。