盐城市境内全新世以来的海陆变迁

Change of Land and Sea in Yancheng Area since Holocene

盐城市地处黄海之滨,全新世以来,经历了陆地—海洋—陆地这一海陆演变过程。早全新世,本区受到海侵影响,但仍以陆地为主。中全新世,海侵达到高峰,本区为浅海环境,形成了纵贯南北的岸外沙堤。晚全新世,河流堆积作用增强,境内东部海岸东迁,形成了滨海平原及废黄河三角洲;西部泻湖区则淤积为里下河平原。

Yancheng City of Jiangsu Province is situated on the banks of the Huang-hai Sea. It has experienced the procedure of land-sea-land since Holocene. During the early Holocene, it mainly remained as land though it was influenced by transgression. The transgression reached its climax during the middle Holocene, and the offshore bar from south to north was formed for its geographical feature of shallow sea. During the late Holocene, rivers became deposited and the east part of seashore moved eastwards. Consequently, the seashore plain and the Deserted Huanghe River Delta were formed; the lagoon in the west became deposited and it became Lixiahe plain.