摘要
阐述了海岸带黄土中放射虫的种类及组合特征，并对其来源进行了探讨。 初步认为：放射虫最初是在间冰期高海面时被黄海暖流带入渤海的，后来在冰期低 海面时，裸露的海底受强大的西北向低空气流作用，致使一些放射虫壳体伴随沙尘 而沉降到附近海岸黄土之中。
The authors found that there were many shells of radiolaria in the loess samples collected from the Liaodong Peninsuls and the Miaodao Islands in the east of Bohai Sea in 1994. Consulting the data on micro- fossils in Quaternary strata and modern sediments in the Bohai Sea and North Yellow Sea and the literature containing information on the path of the Yellow Sea warm current in the North Yellow Sea and Bohai Sea, and after a comprehensive analysis the author finally concluded that the radiolaria come from the deep open sea area into the Bohai Sea and the North Yellow Sea via the warm current of the Yellow Sea during the high sea level stages in the interglacial periods in Quaternary period, and that later, during the low sea level stages in the glacial periods when the Bohai Sea and the North Yellow Sea wereexposed and became a vast plain, the shells of the radiolaria were carried to the loess depositions along with the loessial sediment by strong winds under the cold and arid climatic conditions.
出处
《海洋科学》
CAS
CSCD
北大核心
1995年第6期59-64,共6页
Marine Sciences
基金
国家自然科学基金
关键词
海岸带
黄土
放射虫
渤海
Coastal loess, Radiolsria, Bohai sea
