(Table 1) Occurence of sapropels and sapropelic sediments in the Tyrrhenian S...

Ages computed from datum levels of Channell et al. (1990) and Mueller (1990). Bruhnes/Matayama (0.73 Ma) at 36.05 mbsf, base NN19 (1.63 Ma) at 67.1 mbsf年代数据基于Channell等（1990）与Mueller（1990）提出的地层基准面计算所得。布容-松山极性界限（Bruhnes/Matayama）的年龄为0.73 Ma，对应海底以下36.05 mbsf处；NN19生物地层带的底界年龄为1.63 Ma，对应海底以下67.1 mbsf处。