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地质作用的旋回性及其原因等问题,现已成为迫切需要解决的问题。现已查明,不仅在可燃矿产、磷灰岩及一系列铁、锰矿床形成中沉积物的堆积作用,而且大多数有用金属,磷灰石和云母等矿床形成过程中的内生作用,都“限定”在一定的时间范围内。早已查明,冰川作用及其有关的海平面变化、地表大面积的升降以及火山现象等等,都具有旋回性的特点。各种地质作用的规模、延续时间和强度的不同,表现出的韵律性也不同,而且产生韵律性的原因还有
The cyclical nature of geology and its causes have now become urgent problems to be solved. It has been ascertained that not only the accumulation of sediments in the formation of combustible minerals, apatite and a series of iron and manganese deposits, but also the endogenous effects of most useful metal, apatite and mica deposits “Limited” within a certain time frame. It has long been ascertained that the role of the glacier and its related changes in the sea level, the large-scale movements of the earth’s surface, and volcanic phenomena have all been characterized by cyclicality. Various geological effects of the scale, duration and intensity of the different, showing the rhythm is also different, and the reasons for the occurrence of rhythm