六十年代以来,海洋地质工作的发展达到了空前的程度,达些成就的取得主要是由于许多国家使用了多种新式仪器和新技术,通过大范围的海底调查取得的。所以有的人把这一历史阶段内的海底研究称为海洋地质工作上的革命时期。这一时期内的重大发现之一便是洋底的年龄比海水本身的年龄还要小,就是所谓的海底扩张说。这个学说引起了全世界地球科学工作者的密切注意。 Since the 1960s, the development of marine geology has reached an unprecedented level. Some of these achievements have been made mainly through the use of a large number of new instruments and techniques in many countries through large-scale seabed surveys. Therefore, some people refer to the research on the seabed in this historical stage as the revolutionary period in the work of marine geology. One of the major discoveries during this period is that the age of the ocean floor is even smaller than the age of the sea itself, the so-called seabed expansion. This doctrine has drawn the close attention of earth scientists worldwide.