| 扬子地台西缘宁蒗—盐源地区志留系牙形刺生物地层特征 |
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| 关键词:Silurian conodonts Luguhu of Ninlan western Margin of Yangtze Block |
| 基金项目:地质行业基金项目(项目编号:Hy979813) |
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| The Silurian Conodont Biostratigraphical Characteristics of Ninlang-Yanyuan Region on the Western Margin of Yangtze Block |
| This paper reports for the first time on the characteristics of Silurian stratigraphy and conodont biostratigraphy in Ninlang-Yanyuan region on the western margin of Yangtze block. The stratigraphical distribution of conodonts allows the establishment of three assemblage zones in ascending order:①Panderodus gracilis-Panderodus simplex;②Pterospathodus celloni;③Pterospathodus amorphognathoides. From the viewpoint of biostratigraphy, sedimentary and regional correlation, the authors, based on an analysis of the overlapping relationship between Pterospathodus celloni zone and Pterospathodus amorphognathoides zone, consider that the change from the former to the latter occurred gradually instead of abruptly. |
| LI Zhong-xiong,GUAN Shi-ping,QIAN Yong-zhen.2001.The Silurian Conodont Biostratigraphical Characteristics of Ninlang-Yanyuan Region on the Western Margin of Yangtze Block[J].Acta Geoscientica Sinica,22(3):253-257. |
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