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下扬子区下石炭统发育是否完整,长期存在疑问。以往都把下石炭统金陵组视为石炭系最底部一个地层单位,根据珊瑚和腕足类,与贵州汤粑沟组、湖南刘家塘组对比,认为缺失早石炭世早期的沉积。1983年笔者在江苏江宁陈家边、安徽巢湖、宣城、浙北长兴等地测制剖面,系统采集样品,经阎永奎孢子分析鉴定,在江宁陈家边和长兴牛头山等地首次于上泥盆统五通组擂鼓段顶部发现丰富的早石炭世早期的孢子化石组合和疑
Lower Yangtze area Carboniferous development is complete, there are long-standing questions. In the past, the Lower Carboniferous Jinling Formation was regarded as the bottommost stratigraphic unit of the Carboniferous. According to the corals and brachiopods, compared with the Tangjindigou Formation in Guizhou Province and the Liujiatang Formation in Hunan Province, it is concluded that the Early Carboniferous sediments were missing. In 1983, the author measured sections in Chenjiabian, Jiangning, Anhui Province, Chaohu, Xuancheng, Changxing, and other places in Zhejiang Province. The samples were systematically collected and identified by Yan Yongkui spore analysis. For the first time, The early stage of early Carboniferous spore fossil assemblage and suspected