谈一谈有关地球演化的一个基本问题——大地构造的周期性,或者说地质时间的阶段性问题。大地构造事件是同时的还是不同时的?全球性构造旋回是否存在,在这些旋回中有没有周期性?或者说,地球的地质演化时间是均一、连续的,还是非均一、有阶段性的?对于这些问题,地质学者长期进行着讨论而没有得到一致意见。有两种不同的观点。一种认为地壳岩石自然地分成一些反映地球不同演化期的段落;地史上的各种重要事变,如巨大造山幕,巨大岩浆活动,主要生物群的消亡,大气圈性质和气候的巨变,以及主要海面升降运动等,都是全球性质的。根据这种认识,建立了全球性构造 Talk about a basic question about the evolution of the earth - the periodicity of the earth structure or the stage problem of geological time. Are the tectonic events of the earth simultaneous or not? Whether the global tectonic cycles exist and whether there is any periodicity in these cycles? Or is the geologic evolutionary time of the earth uniform, continuous, non-uniform, and periodic? For these problems, geologists have long been discussing without consensus. There are two different perspectives. One is that the crustal rocks are naturally divided into some paragraphs reflecting the different evolutionary stages of the earth; various important events in the history of the earth, such as the huge orogeny, the huge magmatic activities, the disappearance of the major biota, the changes in the atmosphere and the climate, Sea movements, etc. are all of a global nature. Based on this understanding, a global structure has been established