宁夏海原南华山地区白垩系乃家河组的孢粉组合特征及时代古植被、古气候探讨

摘要

该文详细阐述了宁夏海原县南华山地区白垩系乃家河组的孢粉组合特征，进而对地层时代及古植被，古气候进行分析，得出这是一套早白垩世晚期的孢粉组合，表明当时六盘山一南华山地区的植被是以克拉梭粉的母体植物掌鳞杉为主的针叶林，林下覆盖着苏铁、麻黄和海金砂植物，气候干旱炎热。%In this paper,we research the Sporopollen assemblage characteristics and Ancient vegetation,palaeoclimate at Cretaceous Naijiahe Group from the geology,and we find that ,at the late Early Cretaceous ,the vegetation of Liupanshan--South hua mountain region is coniferous forest,with Classopoilis plants as dominant species .In the forest ,it is covered with cycads,ephedra and Lygodium plants.These shows that the climate is hot and dry in the area at that time.