Discovery of Foraminifers in the Permian Radiolarites in Jiangsu and Anhui Provinces and their Depositional Environment;
苏皖地区二叠纪放射虫硅质岩中有孔虫的发现及沉积环境初探
The quantitative analysis of foraminifers was carried out from Core XL2 in Xinglong sand of the north branch,the Yangtze River Estuary.
通过对长江口北支兴隆沙XL2孔25个沉积物样品的有孔虫定量分析,发现该孔自下而上有4个有孔虫组合带(含10个有孔虫组合亚带),有孔虫分异度偏低,丰度变化大,壳径偏小,含有壳径细小的浮游有孔虫,部分壳体有机械破坏现象,这些特点反映出埋葬群在形成过程中受潮流的搬运、机械分选和破坏作用。
Unit 1,2,and 5 contain foraminifers and ostracods in different abun- dances.
PD孔中见有孔虫6属10种,其中以Ammonia beccani为优势种。