Abundance of calcareous nannofossils across the K/T boundary at ODP Hole 113-690C (Table 1)

A biostratigraphically continuous, but intensely bioturbated, Cretaceous/Tertiary boundary sequence was cored during Ocean Drilling Program (ODP) Leg 113 on Maud Rise (65°S) in the Weddell Sea off East Antarctica. This interval is the first recovered by ODP/DSDP in the South Atlantic sector of the Southern Ocean and offers a unique opportunity to study the nannofossil sequences leading up to and beyond the terminal Cretaceous event at a high southern latitude. […]

在东南极洲外威德尔海的莫德海隆（65°S）处，大洋钻探计划（Ocean Drilling Program, ODP）第113航次钻取了一套生物地层连续但受强烈生物扰动的白垩纪/第三纪界线层序岩芯。该层序是南大洋南大西洋扇区内首个由ODP与深海钻探计划（Deep Sea Drilling Project, DSDP）获取的此类序列，为在南极高纬度区域研究白垩纪末事件前后的超微化石（nannofossil）序列提供了独一无二的研究契机。[…]