大陆漂移说由于自身某些局限性,无法解释大陆是怎样在强度很大的硅镁层中漂移的问题。海底扩张说为此提供了答案。在60年代,人们使用了较为先进的调查技术手段,获得了大量的海底调查资料,在此基础之上,逐渐形成海底扩张说。该说一问世,便引起科学界的极大兴趣,被人称之为是“地球的诗篇”。 The mainland drift says that due to some limitations of its own, it can not be explained how the continent drifts in the high strength Si-Mg layer. Sea-floor expansion provides the answer to this. In the 1960s, people used more advanced survey techniques and obtained a large amount of seafloor survey data. On this basis, they gradually formed a theory of seafloor expansion. The advent of this saying, it has aroused great interest in the scientific community, has been called the “Psalms of the Earth.”