The analysis of characteristics of sporopollen flora showed that the sporopollen flora in the early-middle period of Early Jurasssic belong to Euramerican flora rather than the previously recognized Cathaysian flora.

• 对孢粉植物群特征的分析表明；在早二叠世早、中期；属于欧美植物群范畴；并非以往所认为的属于华夏植物群；也未发生所谓的四大植物区系的混生现象.