【摘要】 徐州地区二叠纪地层连续,孢粉化石保存较好,依据孢粉组合特征将其划分为四个组合带熏即A、B、C、D组合带,虽然其中的孢粉属种相对单调,但可与华北大部分地区及邻区对比鸦此次研究的重要意义在于它是首次利用微体古生物方法划定研究区上石盒子组与石千峰组的界限。更多还原

【Abstract】 Since the good continuation of the Permian strata in Xuzhou area, and the sporopollen fossils in the strata are well preserved, so a division of 4 assemblage zones according to sporopollen assemblage characters were easily divided. In despite of humdrum sporopollen genus and species, but correlations can be made with most North China and neighboring areas. This is the first time to divide Upper Shihezi Formation and Shiqianfeng Formation boundary in the region.更多还原