一、追索岩层或根据已知正常层序确定地层的顶底要确定垂直的或者倾斜得很厉害的地层的顶部和底部时,可以先追索该地层只发生轻微褶皱的地段(图1之B)或者完全未变形的地段(图1之A),然后通过对比并根据地层的正常顺序来加以确定。 First, recourse to the rock or to determine the top and bottom of the formation according to the known normal sequence To determine the top and bottom of the vertical or skewed formation, you can first reclaim the area of ​​the formation of only minor folds (Figure 1 B) or a completely undeformed area (Figure 1, A), and then by contrast and based on the normal sequence of formation.