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海底扩张海底扩张（ｓｅａｆｌｏｏｒｓｐｒｅａｄｉｎｇ）是关于岩石圈发展的一种假说。１９６１年由美国赫斯（Ｈ．Ｈ．Ｈｅｓｓ）和狄兹（Ｒ．Ｓ．Ｄｉｅｔｚ）提出。为板块构造的重要理论支柱，也是大陆漂移的新形式。正因为由于地幔对流，变化了的地幔顶部的玄武岩熔...
Seafloorspreading is a hypothesis about the development of the lithosphere. In 1961 proposed by the United States Hess (H.H.Hess) and Ditz (R.S.Dietz). It is also an important theoretical pillar for plate tectonics and a new form of continental drift. Because of the mantle convection, the basalt melt at the top of the mantle has changed.