西湖凹陷位于东海陆架盆地中部。
Xihu depression is situated at the middle of the Donghai shelf basin.
东海陆架盆地是位于中国大陆东部边缘大陆地壳之上的边缘海盆地。
The East China Sea Shelf Basin is a marginal sea basin located on Continental crust of China eastern margin.
晚白垩世晚期—始新世，火山岛弧向东移动，东海陆架盆地变为弧后盆地。
During late late Cretaceous-Eocene, volcanic island arc moved eastward and the east China Sea shelf basin was turned into a back-arc basin.
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