古地磁场方向
古地磁场方向-
本文对采自陕西省柞水县、湖北省崇阳县以及北京市房山区的三条岩溶洞穴次生化学沉积物&石笋进行了古地磁场方向和相对强度的长期变化研究。
This paper describes the results of secular variation study of paleomagnetic direction and relative intensity using stalagmites-secondary concretions of limestone caves from Zhashui , Shanxi , Chongyang , Hubei and Fangshan , Beijing .