The second dating method was palaeo - magnetic analysis, or magnetic polarity stratigraphy .

第二种测定法是古磁学分析法，也叫磁极地层学测定法。

youdao

The second dating method was palaeo - magnetic analysis, or magnetic polarity stratigraphy .

第二种测定法是古磁学分析法，也叫磁极地层学测定法。

youdao