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盐城上冈地区全新世期间处于泥砂质潮滩环境。根据有孔虫组合分析 ,这套近岸潮滩沉积代表潮下带 -潮间带 -潮上带的一次大海退过程。本文分析了上冈村砖瓦厂采泥坑东侧 SGE柱状剖面全新统的颗石藻化石 ,结果发现这套沉积物仅仅含 Gephyrocapsa oceanica单一属种 ,而且丰度较低。但这个种在剖面上的丰度分布显示三分性 :即自下至上为贫乏或缺失间隔、较常见间隔和常见间隔 ,基本上对应于潮下带、潮间带和潮上带。一般情况下 ,潮坪区由海向陆水动力由强至弱 ,各相带的水动力条件不同 ,其沉积特征各异。颗石藻胳架十分细微 ,在海水中往往以悬浮形式搬运 ,并在水动力较弱时停积。所以 ,水动力是 G.oceanica分布的直接控制因素
Yancheng Shanggang area during the Holocene muddy tidal flat environment. According to the analysis of foraminiferal assemblages, this nearshore sediment represents a large regression of the subtidal-intertidal-tidal zone. In this paper, we analyzed the Holocene fossil from the SGE column section on the eastern side of the pits of the Kamigami-no-brick factory and found that this sediment contained only a single genus of Gephyrocapsa oceanica and its abundance was low. However, the abundance distribution of this species in the profile shows a trisection: that is, there is a lack of or missing interval from bottom to top, and the more common intervals and common intervals basically correspond to the subtidal zone, intertidal zone and tidal zone. In general, the hydrodynamic force from the sea to the land in the tidal flat area is strong to weak, and the hydrodynamic conditions in each phase belt are different, and their sedimentary characteristics are different. Corkscrew frame is very subtle, often in the seawater in the form of suspended handling, and when the hydrodynamic weakness to stop plot. Therefore, hydrodynamic force is the direct control factor of G.oceanica distribution