| 湖南桃源、慈利地区寒武系与奥陶系界线附近含笔石地层研究 |
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| 引用本文： | 刘春莲,俞剑华,方一亭,刘怀宝. 湖南桃源、慈利地区寒武系与奥陶系界线附近含笔石地层研究[J]. 南京大学学报(自然科学版), 1987, 0(3) |
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| 作者姓名： | 刘春莲 俞剑华 方一亭 刘怀宝 |
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| 作者单位： | 南京大学地质系，南京大学地质系，南京大学地质系，南京大学地质系 |
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| 摘 要： | 桃源、慈利一带位于江南地层区边缘,与扬子地区相邻,寒武系与奥陶系界线附近的地层发育良好,沉积连续,化石丰富,生物具有扬子型和江南型之间的过渡性特征,是我国研究寒武系与奥陶系的理想地区之一。本文描记了界线附近的地层,建立了三个笔石带,自下而上为:(1).Dictyograptus wutingshanensis带,(2).D.flabelliformis带,3).Anisograptus带。寒武系与奥陶系界线位于D.wutingshanensis带与D.flabelliformis带之间。本文还对笔石动物群的性质进行了分析,与邻区和国外相当地层进行了对比,并讨论了本区寒武系与奥陶系界线。
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| 关 键 词： | 奥陶系 寒武—奥陶系界线 |
STUDIES ON GRAPTOLITE-BEARING STRATA OF THE CAMBRIAN-ORDOVICIAN BOUNDARY FROM TAOYUAN-CILI, HUNAN PROVINCE |
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| Liu Chunlian Yu Jianhua Fang Yiting Liu Huabao. STUDIES ON GRAPTOLITE-BEARING STRATA OF THE CAMBRIAN-ORDOVICIAN BOUNDARY FROM TAOYUAN-CILI, HUNAN PROVINCE[J]. Journal of Nanjing University: Nat Sci Ed, 1987, 0(3) |
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| Authors: | Liu Chunlian Yu Jianhua Fang Yiting Liu Huabao |
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| Affiliation: | Liu Chunlian Yu Jianhua Fang Yiting Liu Huabao |
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| Abstract: | Taoyuan and Cili are situated on the margin of Jiangnan stratigraphical province and adjoin Yangzi stratigraphical province. The Cambrian-Ordovician boundary sequence is endowed with contineous in contact relation, wellexposed, rich in fossils. Noticeably, this graptolite fauna contains the both members of Jiangnan and Yangzi province. It is one of the best Cambrian-Ordovician boundary sections in China. The Cambrian-Ordovician boundary sequence is described and three graptolite zones are established as follows: 1).Dictyograplus wutingshanensis zone, 2). D. flabelliformis zone, 3). Anisograptus zone. The Cambrian-Ordovician boundary set between D. wutingshanensis zone and D. flabelliformis zone. The nature of graptolite fauna, the correlation of the graptolite-bearing strata with that in other area and the Cambrian-Ordovician boundary are also discussed. |
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| Keywords: | Ordovician Cambrian-Ordovician boundary |
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