| 南郑梁山奥陶系与志留系界线附近的沉积特征及沉积环境 |
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| 引用本文： | 李文厚. 南郑梁山奥陶系与志留系界线附近的沉积特征及沉积环境[J]. 地层学杂志, 1997, 21(2): 146-150 |
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| 作者姓名： | 李文厚 |
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| 作者单位： | 西北大学地质系 |
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| 摘 要： | 陕西南郑梁山地区上奥陶统内海相窄盐度生物化石丰富，以游泳生物为主，底栖生物较少，含笔石化石Ｄｉｐｌｏｇｒａｐｔｕｓｂｏｈｅｍｉｃｕｓ，小型薄壳腕足类和善于游泳的Ｄａｌｍａｎｉｔｉｎａ；粉细砂岩中可见丘状交错层理；沉积环境为深水陆棚。下志留统含大量单调的浮游笔石化石，产笔石Ｇｌｙｐ－ｔｏｇｒａｐｔｕｓｌｕｎｇｍａｅｎｓｉｓ；未见底栖生物化石，底部夹放射虫硅质岩；岩层横向上稳定；沉积环境为深水陆棚与大陆坡过渡带。
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| 关 键 词： | 奥陶系，志留系，丘状交错层理，放射虫硅质岩，深水陆棚，南郑，陕西 |
Advances in the study of the geological age of the Late Cretaceous strata in southwestern Henan |
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| Zhou Shiquan ) Lo Mingjiu ) Wang Deyou ) Zhang Kewei ) Li Junfeng ). Advances in the study of the geological age of the Late Cretaceous strata in southwestern Henan[J]. Journal of Stratigraphy, 1997, 21(2): 146-150 |
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| Authors: | Zhou Shiquan ) Lo Mingjiu ) Wang Deyou ) Zhang Kewei ) Li Junfeng ) |
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| Affiliation: | Zhou Shiquan 1) Lo Mingjiu 2) Wang Deyou 3) Zhang Kewei 2) Li Junfeng 3) |
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| Abstract: | During recent years,in the study of the geological age of the "Red Strata"in southwestern Henan,we have gained the important materials including dinosaur eggs,dinosaurs,charophytes,ostracods,sporo pollen fossils and isotopic datings, etc. providing new and reliable evidences for the division of the Late Cretaceous strata into the Gaogou,Majiacun and Sigou Formations and ruling out the possibility that they are of Early Cretaceous,Cretaceous,or other ages. |
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| Keywords: | fossil dinosaur egg isotopic dating Cretaceous Henan PPAGEES |
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