南京湖山地区孤峰组硅质岩中的放射虫化石

FOSSIL RADIOLARIANS FROM THE KUFENG FORMATION, HUSHAN AREA, NANJING

南京湖山地区孔山下二叠统孤峰组硅质岩中含有丰富的放射虫化石,这些化石主要以Fol-licucullus scholasticus,Pseudoalbaillella scalprata,Latentifistula texana和 Ruzhencevispongus cf.uralicus占优势。文章对这些化石进行了系统的描述,并建立一个组合带,即Ruzhencevispongus cf.uralicus组合带。还将这个组合带与国内外相当时代的组合带进行了比较,并讨论了这个带的时代。

Diverse,abundant and well-preserved radiolarians discovered from the cherts in the middle and upper members of the Kufeng Formation (Permian), Hushan area, Nanjing, JiangsuProvince,include ten genera and fourteen species. Among them,the dominant species are Fol-licucullus scholasticus, Pseudoalbaillella scalprata, Latentifistula texana and Ruzhence-vispongus cf. mammilla uralicus; Phaenicosphaera is common in the Kufeng Formation. Some elements indicate that the upper layers of the Kufeng Formation belong to Early Permian.Based on the distribution pattern of the radiolarians,the Ruzhencevispongus cf. uralicus As-semblage Zone is proposed for the middle to upper part of the section. Biostratigraphically,this zone is correlated with the Ruzhencevispongus uralicus Zone of the former, NortheastUSSR,and is considered as equivalent to the Phaenicosphaera mammilla Assemblage Zonefrom Longtan,Nanjing,i. e.,it falls into late Maokouan(late Guadalupian).