形成各种堆积体——砂滩、砂嘴、砂洲等的近岸沉积层结构的研究在海岸研究中占有特殊地位。在沉积层结构中,以及它的岩石学和动物区系方面反映着沉积层发展的历史。对于堆积体结构的研究,可以使我们追溯它发展时期的层序性,从而指出在特定的地理条件下的海岸演化的一般规律性。通过厚度的研究、层次相关性的对比、使用现代方法测定沉积层的绝对增长,我们就 The research on the structure of nearshore sediments that formed all kinds of sediments - sand beach, sand nozzle, sandbank and so on, occupies a special position in coastal research. In the sedimentary structure, and its petrology and fauna reflect the history of sedimentary development. The study of the structure of the deposit can allow us to trace the sequence of its development and indicate the general regularity of the evolution of the coast under certain geographical conditions. By the thickness of the study, the contrast of the level of correlation, the use of modern methods to determine the absolute growth of sediment, we