(Table 1) Strontium concentration and isotope ratios of carbonates from DSDP ...

Recent revisions of the geological time scale by Kent and Gradstein (in press) suggest that, on the average, Cretaceous magnetic anomalies are approximately 10 m.y. older than...肯特（Kent）与格拉茨坦（Gradstein）即将出版的最新地质年表（geological time scale）修订研究表明，平均而言，白垩纪（Cretaceous）磁异常（magnetic anomalies）的形成时间约比……早10百万年（m.y.）。