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苏南堰桥组创立以来,不少地质工作者,特别是古生物工作者,力持堰桥组(或相当之层位)划归下二叠统,但是,下二叠统顶界上移至何处却众说纷纭。由于东吴运动与上、下二叠统分界密切相关,于是东吴运动的位置,也随研究者所确定的“假整合面”的不同,而浮动起来。笔者较长期在浙、皖边界地区(图1)从事煤旧地质工作,观察发若干地质现象,采集了一些古生物化石,研读了有关资料和论著,在此对区内龙潭组的下界及东吴运动的位置,提出一些粗浅看法。
Since the founding of the Weinanqiao Bridge Formation, many geologists, especially paleontologists and force-retaining weir bridges (or equivalent strata) have been assigned to the Lower Permian. However, the upper boundary of the Lower Permian moved up to However, there are different opinions. Due to the close relationship between the Soochow movement and the Upper and Lower Permian demarcations, the location of the Soochow movement also fluctuated according to the “fake integrative” determined by the researchers. For a long time, the authors engaged in the geological work of coal in the boundary areas of Zhejiang and Anhui (Figure 1), observed some geological phenomena, collected some paleontological fossils, studied relevant data and treatises, and studied the lower boundary of the Longtan Formation and the Soochow The location of the exercise, put forward some superficial view.