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第四系下限的争论由来已久,由于其自身的复杂性,因而众说纷纭。对其进行认真深入的讨论是十分必要的。笔者根据近年来接触到的资料及野外所见,认为其所以争论不休,是由于不同研究者从不同角度出发采用不同划分标志造成的。第四系底界应该从地史特征出现算起,但是作为第四纪基本特征的构造运动、冰川、黄土及人类初现时间在世界各地不齐,并且这几个方面有着成生联系和因果关系,明显的存在着滞后性,所以很难用一条线划定。由于冰川的出现使
The quarrel over the lower limit of the Quaternary has a long history of controversy due to its own complexity. It is very necessary to have a thorough discussion of it. According to the information we have come into contact with in recent years and the opinions we have seen in the field, the author believes that they are endlessly debated because different researchers have used different classification marks from different perspectives. The bottom line of the Quaternary should be counted from the appearance of geo-history. However, as the tectonic movement of the basic characteristics of the Quaternary period, glaciers, loess and human beings have different initial appearance times all over the world, and these aspects have a connection and causal relationship Relations, there is obviously a lag, it is difficult to use a line delineation. Due to the advent of glaciers