浙西和长江三角洲南翼潮滩沉积与风暴事件

浙西及长江三角洲南翼潮坪剖面均显示，微型层序和小型层序是潮坪沉积的基本组成单元。潮坪观测证明，砂质单层是风暴沉积，而泥质单层是正常天气的沉积单元。砂、泥质单层共同组成一个小型层序（风暴序列）．风暴沉积在潮坪层序中占重要地位，大小潮沉积旋回的概念不适合于长江三角洲一类的非潮道潮坪。

TIDAL FLAT DEPOSITION AND STCRM EVENT IN THE SOUTHERN FLANK OF YANGTSE DELTA AND IN THE WESTERN PART OF ZHEJIANG PROVINCE

The researck of the tidal flat deposits in the southern flank of Yangtse delta and in paleozoic section of Zhejiang province shows that micro-sequence and small sequence are the fundamental u- nits of tidal flat. The observation in the Nanhui tidal flat demonstrates that sand layer is deposited by storm, and clay layer is deposited during normal weather. They compose small sequence which is a storm sequence. Storm sediments account for the majority of tidal flat sequence. The concept of neap-spring tidal cycle is not suitable for tidal flat in Yangtse delta.