要解决各种地层接触面、判断地壳运动中的渐变和突变关系、划分地壳运动和地层沉积的先后、决定构造及沉积的繼承作用和新生作用二者的相互关系、观察古地理和古构造方向的演变等問题,可以用的地買方法很多,这里所談到的“地层不整合面的观察”不过是其中的一个相当重要的方法,并非全靠这个解决一切問題。 It is necessary to solve the stratigraphic contact surface to determine the relationship between gradual change and abrupt change in the crustal movement, to divide the crustal movement and stratigraphic sedimentation successively, and to determine the relationship between the succession and rejuvenation of structure and sedimentation and to observe the paleogeography and palaeostructure direction There are many ways to buy land. The “observation of strata unconformity” mentioned here is only one of the most important methods. It is not based entirely on this solution to all problems.