北京延庆地区雾迷山组燧石相微体古生物研究

本文报道的微体化石产于北京延庆地区雾迷山组中的燧石相岩层中,共鉴定出10个属19个种,其中含1个新种,3个未定种,以及2个相似种。化石类型以蓝细菌中的颤藻科、念珠藻科和色球藻科属种为主,还保存有少量绿藻和大量分类位置未定的藻类。新的化石资料必将进一步丰富燕山雾迷山组的微化石群的内容,并为进一步评价雾迷山组微化石的生物演化和多样性的水平,及其生物地层意义提供更充分的依据。

MICROFOSSILS FROM CHERT OF THE WUMISHAN FORMATION IN THE YANQING AREA,BEIJING

In this paper were described 19species belonging to 10genera of the microfossils,which were discovered from the chert of Precambrian Wumishan Formation in the Yanqing area of Beijing,including three unnamed forms, one new species and two conformis.Major fossils were Osciatoriaceae,Nostocaceae and Chroococcaceae.Moreover, some Chlorophyceae and abundant incertae sedis were discovered.The new data enriches the microfossil assemblage of the Wumishan Formation in Yanshan,provides more evidence for further survey of the organic evolution and diversity of microfossils from the Wumishan Formation and also has the important biostratigraphic implication.