sea floor spreading

The Mariana Trough is an actively opening back arc basin that lies at the eastern edge of the Philippine Sea plate, and in the transition time from rift to sea floor spreading.

位于菲律宾板块和太平洋板块之间的马里亚纳海槽，处于弧后张裂向海底扩张的过渡阶段，是深入研究板块运动与弧后扩张动力学过程的理想地区。

It is also believed that the spreading of sea floor with creation of new ocean crust has not appeared yet in the Okinawa Trough, which is a product of back-arc taphrogenesis, but not that of back-arc spreading.

认为冲绳海槽尚未出现伴有新洋壳形成的海底扩张作用，冲绳海槽是弧后裂陷，而非弧后扩张的产物。

Tidal model of sea-floor spreading

海底扩张的潮汐模式

The studies of Sr and REE and Sr and Nd isotopes geochemistry in the western Pacific marginal sea will play an important role in the study of the sea floor spreading of western Pacific marginal sea and the evolution of the paleoceanography environments and Eastern Asia continent environments.

开展以Sr和REE等微量元素以及Sr、Nd稳定同位素地球化学研究，对于解决西太平洋边缘海的海底扩张和古海洋及东亚大陆的环境变迁有重要的意义。

The idea of sea-floor spreading actually preceded the theory of plate tectonics.

海床扩展说实际上早于板块结构理论.

The sea floor is spreading away from the mid-ocean ridges.

海底正在从大洋中脊扩张开来.

New sea floor is constantly being created along spreading centers.

新海底沿着扩张的中心不断地产生.