摘要
本文孢粉化石是通过延庆盆地杨户庄、阜高营及东龙湾地区地层剖面研究的。自下而上划分为五个孢粉组合带、植被演替和气候变化阶段。１．Ｑｕｅｒｃｕｓ－Ｒａｎｕｎｃｕｌａｃｅａｅ－Ｇｒａｍｉｎａｅ，针阔混交林－草原，气候温暖偏干。２．Ｐｉｎｕｓ－Ｐｏｌｅｍｏｎｉａｃｅａｅ，森林－草原，气候温凉干爽。３．Ｑｕｅｒｃｕｓ－Ｐｉｎｕｎｓ－Ｇｒａｍｉｎａｅ，针阔混交林－草原，气候温暖干燥。４．Ａｂｉｅｓ－Ｐｉｃｅａ－Ｐｏｔａｍｏｇｅｔｏｎａｃｅａｅ，暗针叶林，气候寒冷。５．Ｐｉｎｕｓ－Ｂｅｔｕｌａ－Ａｒｔｅｍｉｓｉａ，森林－草原，气候温凉较湿－冷凉干燥。根据孢粉组合反映的植被及气候演变特点，与华北地区早更新世时期的气候变化特点基本一致。结合沉积，海陆相动物化石的研究成果，与北京平原区，泥河湾盆地早更新世可以比较。
The sporo-pollen fossils was researched from the sections of Yanghuzhuang,FugaoYing and Donglongwan areas of Yanqing basin,and divided into 5 Palynological assemblages,such as:1.Quercus-Ranunculaceae-Graminae 2. Pinus-Polemoniaceae3.Quercus-Pinus-Graminae 4.Abies-Picea-Polamogetonaceae 5.Pinus-Betula-Artemisia According to the feathers of the spore-pollens assemblages represent five phases ofpalaeovegetive changes and five undulations of palaeoclimate.These undulations can besynthetically divided into two climatic times,that is warm→cold.Combining the results onsediments marine and land faunas can be comparable with Early Pleistocene in Nihewanbasin and Beijing plain regions.
出处
《北京地质》
1996年第1期1-9,共9页
Beijing Geology
基金
国家自然科学基金地质行业科技发展基金
关键词
更新世
孢粉组合
古植被
古气候
延庆盆地
地层
pleistocene palynological assemblage palaeovegetation palaeoclimate yanqing basinyanghuzhuang
