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陆相晚三叠世和早侏罗世地层的划分,是一个长期有争议的问题。多年来,上三叠统和下侏罗统发现了许多化石,对两系的划分提供了一定的依据。但是晚三叠世和早侏罗世的孢粉,目前仍报道的很少。笔者对河南义马地区的两个钻孔剖面,进行了系统的孢粉分析工作(2001孔和804孔),通过研究,总结了两个明显不同的孢粉组合:上三叠统谭庄组Punctatisporites-Apiculatisporis-Chordosporites组合和中一下侏罗统义马组的Cythid-
The division of terrestrial Late Triassic and Early Jurassic strata is a long-standing controversial issue. Over the years, many fossils have been found in the Upper Triassic and Lower Jurassic, providing a basis for the division of the two systems. However, the late Triassic and Early Jurassic pollen, is still reported very little. The author systematically polled the two boreholes in Yima region, Henan Province (2001 holes and 804 holes). Based on the study, we conclude two distinctly different sporopollen assemblages: the Upper Triassic Tanzhuang Formation Punctatisporites-Apiculatisporis-Chordosporites and the Middle Jurassic Yima Formation Cythid-