从孢粉化石证据论冀北后城组的时代ON AGE OF THE HOUCHENG FORMATION IN HEBEI IN THE LIGHT OF PALYNOLOGICAL EVIDENCE
张路锁,张树胜,赵克明
摘要(Abstract)：
主要分布于冀北地区的后城组是一套以河流相红色砂砾岩为主的地层,此前在不同地点的该岩组中曾发现中侏罗世晚期的叶肢介、瓣鳃类和爬行动物化石和晚侏罗世的介形类和孢粉等化石。新近在蔚县后城组发现的孢粉组合与此前在宣化堰家沟、万全渔儿山西侧后城组晚侏罗世孢粉化石组合面貌具有明显的差异,时代属中侏罗世。孢粉化石证据说明冀北的后城组系—套中—晚侏罗世沉积。
关键词(KeyWords)： 生物地层;孢粉组合;地质时代;后城组;罗系;蔚县;河北
基金项目(Foundation): 河北省国土资源厅2007年矿产资源补偿费地质勘查专项(2007995023)部分成果
作者(Author): 张路锁,张树胜,赵克明
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