期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
The Carboniferous and Permian Florsa and Their Palaeogeographical Evolution in Quyang,Hebei Province
摘要/Abstract
在河北省曲阳石炭一二叠纪地层中发现古植物化石29属62种,包括真蕨纲和种子蕨纲、楔叶纲、石松纲、瓢叶纲、苏铁纲、种子化石、科达纲、银杏纲.此古植物群华夏植物群的特点明显,纵向上可划分成5个古植物组合;演化具有阶段性,组合的变化与古地理6个演化阶段相适应.
The fossil plants under study were collected from the Upper Carboniferous and Permian of Quyang coalmine in Hebei province.the flora was composed of 62 species in 29 genera belonging to Filicopsida et Pteridospermopsida,Lycopsida,Noeggerathiales,Sphenopsida,Cycadopsida,Cordaitopsida,Ginkgopsida,and Seeds.the flora is of a typical cathaysia flora.Five assemblage zones corresponding to each lithologic formations are recongnizable according to the variation of abundance and the known stratigraphical rangs of thespecies.According to the five assembleg zones,the evolution of the paleaogeographical condition of the flora could be divided into five stages based on sedimentary feature and the characteristics of the fossil plant assemblages.