The evolution process under the control of the multigeodynamic force system (including the boundary forces of Eurasia-Pacific-Indian three massive plates around Nansha block, effects of the deep mantle, relative soft layer-sliding planes within Nansha lithosphere block and the earth's rotational inertial force) can be briefly divided four stages: the late Cretaceous to the early Eocene stage of uprilfing-erosion and shear-extension caused by the oceanwards-eastwards withdrew of Pacific subduction zone and the delamination of proto-subducted slab after the stage of pre-Cretaceous pre-rifting active continentoceanic plate margin. In this stage, the Nansha transcrustal layering-block started to move southeastwards on the Nansha transcrustal layer-sliding plane, meanwhile, the Andu-Bisheng and Liyue-Banyue basement layering-block slid on their upper-crust layer-sliding planes, and Xibu accretion zone was formed. Successively, it entered the stage of the mid-Eocene to early Oligocene, when NW-SE sea-floor spreading occurred in the southwest subbasin owing to the slip-line field initiated by the collision between the Indian and Eurasian plates, Zengmu foreland-basin started to develop in the same time. And in the stage of late Oligocene to early Miocene, near NS simple-shear extension and sea-floor spreading in the central subbasin of eastern South China Sea resulted from the south-southeastwards drawing-force of the mantle-flow. The crustal layering-blocks and the Miri accretion zone formed also in this stage.
南沙岩石圈新生代微板块及板内层块构造的动力演化过程，在多元动力等因素(如块体之外的欧-太-印三大板块运动边界力和地幔深部活动因素、块体内部软弱层滑面以及地球自转变化)控制下，大致经历了4个阶段的演化：从前晚白垩世的裂前活动陆-洋板块边缘阶段因太平洋俯冲带向东跃迁、原向NNW俯冲消亡的板片的拆沉、幔隆而进入晚白垩世-早始新世的隆升剥蚀、剪切伸展演化阶段，南沙超壳层块顺超壳层滑面祥东南运移、安渡-毕生与礼乐-半月基底层块沿上壳层滑面拆离，西布增生带形成；继而先后在中始新世-早渐新世期间受印-欧板块碰撞滑线场、地球自转加速影响出现西南海盆NW-SE向海底扩张和曾母前陆盆地的发育，和晚渐新世-早中新世期间南—东南向地幔流牵引造成的中央次海盆近NS向单剪伸展与海底扩张、壳体层块向南差异滑移、米里增生带形成；中中新世以来，印度-澳洲板块快速向北俯冲，构成今日南海格局。
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 barely ten since systematic deep ocean bathymetry revealed the structure of rifts, fractures and trenches associated with sea floor spreading.
系统的深海深度测量揭示了与海底扩张有关的狭谷带、断裂带和海沟的结构。
The continental drift theory and sea-floor spreading theory.
大陆漂移和海底扩张。
Geologists will be hammering at outcrops, making geological maps, exploring the sea floor, and scrutinizing moon rocks as long as mountain-making, continental drift, sea floor spreading, earthquakes, and other planetary features remain incompletely explained.
只要像造山过程，大陆飘移，大洋扩展，地震以及其它一些星球现象还不能全面得到解释，地质学家便会在露头上用铁锤敲打，填制地质图，勘查海底以及详尽地研究从月球带回的岩石。
In the whole period of the 20th century, the cognition of Earth has experienced several stages, i. e., continental drift sea floor spreading lithospheric plate tectonics, and established basically the global tectonics with its connotation of mobilism.
整个20世纪的重大成就是对地球的认识经历了大陆漂移、海底扩张和岩石层板块大地构造的发展，基本上建立起以活动论为内涵的全球构造观。
Crustal " rolling-extending effect " and sea-floor spreading and continental drift
地壳轧展效应与海底扩张及大陆漂移
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。
East pacific rise geothermal belt The sea floor is spreading away from the mid-ocean ridges.
东太平洋中脊地热带海底正在从大洋中脊扩张开来。
Plenty of H2O and LILE entered the depleted mantle wedge, led to the partial melting. Along the spreading ridges, the magma extruded on the sea floor and formed the new SSZ-type oceanic crust and basin (175Ma).
大量来自俯冲板片的水和大离子亲石元素进入亏损地幔楔，使之发生部分熔融，生成的岩浆沿着扩张脊在海底喷发，形成了新的SSZ型洋壳和洋盆，时代为175Ma左右。
It is barely ten since systematic deep ocean bathymetry revealed the structure of rifts, fractures and trenches associated with sea floor spreading
系统的深海深度测量揭示了与海底扩张有关的狭谷带、断裂带和海沟的结构。他都快二十了，还是睁眼瞎子
Therefore, we believe that the SW Subbasin was formed by sea floor spreading in late Eocene to early Oligocene.
据此认定西南海盆是在晚始新世至早渐新世通过海底扩张形成的。
The sea floor is spreading away from the mid-ocean ridges.
海底正在从大洋中脊扩张开来。
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。
Plate Tectonics and Sea-floor Spreading
板块结构与海床扩展
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。
They called their theory " sea floor spreading. " The theory explains that as the sea floor spreads, the tectonic plates are pushed and pulled in different directions.
他们把他们的理论叫做“海底扩张”。这个理论解释了，随着海底扩张，板块在不同的方向上被推拉。
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。
Spreading out these force vectors of mechanics model on the earth's surface, it can be directly seen how the continental drifting and sea - floor spreading are in motion affected by these forces.
把这个力学模型计算的力矢量展布于地球表面，可以非常直观地显示大陆漂移和海底扩张在这些力的作用下如何进行运动。
With the discovery of sea-floor spreading in the late 1950's and early 60's, the idea was reinvigorated.
随着20世纪50年代晚期和60年代早期海底扩张的发现，大陆漂移思想重新复苏。