DISCUSSION ON THE AGE OF THE SHANGSI FORMATION IN THE LIGUANQIAO BASIN
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摘要: 上寺组与核桃园组为整合关系。它不是核桃园组的横向相变产物,而是核桃园组的上覆地层,具有一定的厚度,独特的岩性、明确的接触关系,是盆地回返收缩阶段的沉积。按照优先率,上寺组一名应当保留,继续使用。根据核桃园组上段所产的化石属于晚始新世,作者认为将上寺组划为渐新统较为合适。Abstract: There is a conformitive relation between the Shangsi and the Hctao formations. The Shangsi Formation is an overlying sequence with a certain thickness and distinct litho-characteristics, deposited during the basin shrinking rather than a product of lateral facies change within the Hetao Formation. According to priority, the term of the Shangsi Formation should be reserved. Since the fossils produced in the upper section of the Hetao Formation attributed to the age of late Eocene, the authors of this paper think it suitabe to define the age of the Shangsi Formation as Oligoeene.
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[1] 王从风等,1987,河南诸盆地下第三系划分和对比的新认识,石油实验地质,第9卷第2期. [2] 关绍曾,1984,豫、鄂李官桥盆地早第三纪介形类兼论Cypris henanensis的个体发育,微体古生物学报,第1卷,第1期. [3] 李云通,1983,河南浙川县-湖北均县李官桥盆地玉皇顶组的腹足类化石,贝类学论文集,第一集,科学出版社. [4] 李云通等,1984,中国的第三系,中国地层(13),地质出版社. [5] 周世全等,1984,河南李官桥盆地“红层”划分的意见,地质科学,第一期. [6] 高玉,1976,河南吴城、浙川两盆地始新世哺乳动物化石地点及层位,古脊椎动物与古人类,第14卷,第1期. -
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