【作者】 李星学； 蔡重阳； 欧阳舒；

【Author】 Li Xingxue Cai Chongyang Ouyang Shu (Nanjing Institute of Geology & Palaeontology,Academia Sinica)

【机构】 中国科学院南京地质古生物研究所；

【摘要】 <正>一、前言五通组过去通称“五通群”,主要分布于长江下游苏、浙、皖一带,亦偶见于鄂东武汉、赣北鄱阳湖北岸等地。这是一套以陆相为主的沉积,富产具泥盆、石炭纪双重特色的植物群和独特的胴甲类鱼化石而驰名于世。五通组的时代,由于其植物群在早期研究中,更多还原

【Abstract】 The Wutong Formation(formerly Wutong Series),considered as a set of elastic rocks of continental origin,is widely spread in the eastern part of South China.It consists mainly of quartzose sandstones and conglomerates intercalated with a few layers of shales or sandy shales and can be divided into two members,the lower the Huanshan,and the upper,the Leigutai me- mbers in Longtan,where the parastrato-type is located near Nanjing.Owing to the presence of Sublepidodendron mirabile(Nath.),Sphenophyllum lungta- nense Goth.& Sze,etc.in the upper part of the Leigutai member,Gothan & Sze(1933)in their pioneer palaeobotanical study believed the Wutong For- mation to be of Early Carboniferous.However since the discovery of a An- tiarehi fauna in its upper part(Liu and Pan,1958,and Pan,1964),the age of this formation has given rise to much controversy.They considered it of late Middle Devonian or early Upper Devonian.Based on a relatively synthe- tical study of the flora,fish fauna,lithologieal facies as well as the new finding of Leptophloeum rhombicum in the upper part of Leigutai member, Liu(1963,1964)holds that the Wutung Formation belongs to the Late De- vonian.Since then,this opinion has been generally accepted by geologists and palaeontologists in China.更多还原