Permian palynofioras from Yongchang and Sunan of Gansu Province and their phytoprovincial characteristics  

Permian palynofloras from Yongchang and Sunan of Gansu Province and their phytoprovincial characteristics

作　　者：Shu, OY Zhu, HC Wang, H 

机构地区：[1]Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China [2]Chinese Acad Sci, Lanzhou Inst Geol, Lanzhou 730000, Peoples R China

出　　处：《Chinese Science Bulletin》1999年第9期831-834,共4页

摘　　要：The Early Permian (Shansi + Lower Shihhotse Formations) palynofloras of Longshoushan are dominated by Cathaysian-Euramerican common forms, mainly composed of pteridophytic and pteridospermous spores. But up to the Lower Shihhotse Formation, gymnosperms greatly developed, and they possibly already dominated the vegetation in the Upper Shihhotse Formation; while in the late Late Permian, they indicate a strong colour of Subangara area. In other words, during the whole Permian, the Cathaysian flora had a history from prosperity to decline, and Subangara plants might have had a reverse tendency there.The Early Permian (Shansi + Lower Shihhotse Formations) palynofloras of Long-shoushan are dominated by Cathaysian-Euramerican common forms, mainly composed of pteri-dophytic and pteridospermous spores. But up to the Lower Shihhotse Formation, gymnosperms greatly developed, and they possibly already dominated the vegetation in the Upper Shihhotse Formation; while in the late Late Permian, they indicate a strong colour of Subangara area. In other words, during the whole Permian, the Cathaysian flora had a history from prosperity to decline, and Subangara plants might have had a reverse tendency there.

关 键 词：PALYNOFLORA phytoprovince PERMIAN GANSU Province. 

分 类 号：P534.46[天文地球—古生物学与地层学]