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浙江濒临的东海,面积约77万平方公里,平均水深为370米。海底地形由陆架、陆坡和海槽等地貌单元所组成,其中陆架约占东海总面积的67%。现将其地理环境概况阐述于后。东海是西太平洋的陆缘海之一。其陆架地壳厚度为30—33公里,属大陆型地壳;冲绳海槽地壳厚度15—24公里,它比大陆型地壳薄,而比大洋型地壳厚,为过渡型地壳;琉球群岛以
Zhejiang verge of the East China Sea, an area of about 770000 square kilometers, with an average depth of 370 meters. Seabed terrain by the continental shelf, slope and trough and other geomorphological units, of which the shelf accounts for about 67% of the total area of the East China Sea. The geographical environment is now outlined in the post. The East China Sea is one of the continental margins in the western Pacific Ocean. Its crustal crust is 30-33 km thick and belongs to the continental crust. The thickness of the crust in the Okinawa Trough is 15-24 km thick, which is thinner than the continental crust and thicker than that of the oceanic crust. The Ryukyu Islands