The earth

during its historically evolving. pvocess

because of the divergence of mantle

has gradully engendered the hydrosphere. When the hydrosphere his once come into being

many phenomena such as accumulation

migration and concentration of water followed. Apart from the movement of water itself

also it causes that the matter on upper crust migrates in large scale. Both of them make the state of tgravitative bullonce in up(?)el mantle and all parts of crust

conserration of angular momentum and axis semmetry des- troyed coutinuously. The matter of crust is circumscribed by physical mechanism of the earth which always tends to ballance

conserva tion and stableness

therefore it brings forth the tectonic movement of the crust. Transforming a geosyncline into a range

subsidence and rise of the crust

formation of the festoon islands and the Mid - Oceanic Ridge are all the results of the movement and work of waters in ocean. Since the hydrosphere formed

it has been the. fundamental and prineipal impetus of crust movement. The change of quantity and qnality in the process of forming and developing of hydrosphere causes that the form of crust move- ment evolves continuously. The crust movement is not a cycle of the heat power and mechanicality in going round and round. but a historical process in deepening the development continuously. It is the action of hydrosphere that makes the earth form a distinctive crust movement which is different from other similar earth planet and a distinctive planet surf ce. Without waters in ocean

the enrth would have formed a surface just as the similar earth planet on which ring structures would have been found everywhere.