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通过对上扬子地台东南缘奥陶纪碳酸盐台地、台缘斜坡和盆地三个不同相区典型剖面的沉积学、生物地层学及岩石地层学等方面的综合研究，在该地区奥陶系中识别出时限为２ ～５ Ｍａ 的１８ 个正层序和相应的１９次海退事件，将其与塔里木、华北及北美、澳洲等大陆对比结果表明，上扬子地台东南缘奥陶纪的绝大部分三级以上海退事件及沉积层序有着良好的全球可比性。
Through the comprehensive study on the sedimentology, bio-stratigraphy and lithostratigraphy of Ordovician carbonate platform, marginal slope and three typical facies in the southeast margin of the Upper Yangtze platform, The authors identify 18 positive sequences with a duration of 2 ~ 5 Ma and 19 corresponding regression events. The results of their comparison with the Tarim, North China, North America, and Australia show that the Ordovician The majority of the above-grade 3 offshore retreats and sedimentary sequences have good global comparability.