江宁五通群上部古羊齿及其植物化石组合

Archaeopteris and its plant fossil assemblage in the upper part of Wutong group

南京江宁上坊上泥盆统五通群上部发现古羊齿,且较丰富,植物组合以鳞木类为主,钩蕨、古羊齿亦相当发育。这一组合与下石炭统的古植物有差异,其中古羊齿的标准性具广泛的地层对比意义。

Rich occurrences of Archaeopteris were found along the upper parts of Wutong group,upper Devonian series in Jiangning,Nanjing City.Its plant assemblage is mainly composed of Lepidodendron,and Archaeopteris is rather developed.The assemblage is quite different from the fossil assemblage in the lower Carboniferous series,in which the normalization of Archaeopteris is of contrastive significance to the strata.