一、渤海湾西岸变迁的动态 受冲积作用而堆积起来的贝壳堤,就是渤海湾西岸变迁的见证。 多年来,很多学者对贝壳堤进行了不同程度的研究,发表了各种不同的意见。归纳起来有以下三种: 南京大学地理系王颖同志根据地貌、沉积物及历史地理分析,初步确定了渤海湾外围两条贝壳堤的形成时代:第I I. The Dynamics of the Changes in the West Bank of the Bohai Bay The shell embankment piled up by alluvium is the witness of the vicissitudes of the West Bank of the Bohai Gulf. Over the years, many scholars conducted different degrees of research on the seawall and delivered various opinions. Summarized in the following three: Based on the topography, sediment and historical and geographical analysis, Wang Ying, Department of Geography, Nanjing University, initially identified the formation of two shell dike outside Bohai Bay: the first