x
uploads/geographical north.jpg

geographical north 正北。

geographical strategic point

The original orientation ( i . e . the mol with respect to the geographical north ) of the core in the formation can be obtained by palaeomagnetic orientation tests . the two results are combined to define the direction of the maximum principle stress of the well or field 該方法根據差應變分析( dsa )實驗確定地應力相對于巖心標志線的方向,利用古地磁方法確定巖心標志線相對于現代地理北極的方位,兩者結合確定地應力方向。