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冰后期的海侵,淹没了渤海地区;大约在距今6000年左右,海侵达到最大范围。本文按照海相地层的分布,讨论了渤海南岸当时的海侵界线,又根据粉砂淤泥质海岸平均高潮线上发育的贝壳堤的位置,确定了尔后的几条古岸线。从而表明在该区6000年来的海岸淤长过程中,曾出现过海岸线的数次停顿,这与黄河三角洲河口的交替摆动有密切关系。从而为研究渤海南岸的全新世地质历史,黄河三角洲的发育和区内资源开发提供重要的依据。
The transgression of the late ice flooded the Bohai Sea; about 6,000 years ago, the transgression reached the maximum. Based on the distribution of marine strata, this paper discusses the current transgression line at the southern coast of Bohai Sea and determines the few ancient coastlines based on the position of the shell embankment developed on the silt-muddy coastline. This shows that during the 6,000 years of coastal siltation in the area, there have been several pause of the coastline, which is closely related to the alternation of the estuary of the Yellow River Delta. Which will provide an important basis for the study of the Holocene geologic history on the south bank of the Bohai Sea, the development of the Yellow River Delta and the exploitation of resources in the region.