南京附近地区,广泛分布着新生代的玄武岩,自二十年代起,就有不少的中外地质工作者曾作过大量工作。但由于对相邻于它们的上下沉积岩层的时代争论不休,以致长期以来玄武岩的时代问题未能得到解决,至今仍成为一个悬案,严重地影响着区域地质测量和填图,以及正确地评价地震构造活动性和地震烈度危险区划的工作。为此,我们选 Near the area of ​​Nanjing, the Cenozoic basalts are widely distributed. Since the 1920s, quite a number of Chinese and foreign geologists have done a great deal of work. However, due to endless controversy over the age of the upper and lower sedimentary formations adjacent to them, the long-standing problem of basalts has not yet been solved and is still a pending case that has seriously affected the regional geological survey and mapping as well as the correct assessment of earthquakes Construction of activities and seismic intensity of dangerous zoning work. To this end, we choose