| 长江口拦门沙全新世微体化石群特征及其意义 |
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| 引用本文： | 华棣,陈吉余. 长江口拦门沙全新世微体化石群特征及其意义[J]. 华东师范大学学报(自然科学版), 1988, 0(1) |
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| 作者姓名： | 华棣 陈吉余 |
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| 作者单位： | 河口海岸研究所(华棣) |
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| 摘 要： | 本文通过对长江口拦门沙地区崇明岛、横沙岛三个钻孔的微体古生物综合分析,发现全新世地层中有四个微体化石层,它们分别指示了该地层经历了(由下往上)由滨海-河流相→滨海-河口相→浅海相→河口相的环境演变过程。并结合孢粉和 C~(14)测年资料认为该区全新世地层可以四分,即古全新世、早全新世、中全新世、晚全新世。
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| 关 键 词： | 长江口 拦门沙 全新世 微体古生物 沉积环境 |
On Characteristics of the Microfauna of Holocene in the Mouth Bars of the Changjiang Estuary and its Significance |
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| HUA DI Institute of Estuarine and Coastal Research. On Characteristics of the Microfauna of Holocene in the Mouth Bars of the Changjiang Estuary and its Significance[J]. Journal of East China Normal University(Natural Science), 1988, 0(1) |
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| Authors: | HUA DI Institute of Estuarine and Coastal Research |
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| Affiliation: | HUA DI Institute of Estuarine and Coastal Research |
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| Abstract: | According to the distribution of microfauna assemblages of the column profilefrom bottom to top,the sediments of Holocene in the mouth bars of the Changjiangestuary may be divided into four microfauna assemblages as follows:1,Elphidiummagellanicum-Ammonia beccarii var.-Cribrononion subincertum assemblage.2,Ammonia beccarii var.-Elphidium magellanicum-Pseudononionella variabilisassemblage.3,Ammonia beccarii var.-Epistominella naraensis-Florilus decorusassemblage.4,Epistominella naraensis-Ammonia beccarii var.-Ammonia convexi-dorsa assemblage.Based on the analysis of microfauna,spore-pollen and C~(14)datingdata,the paleogeographic environment of the Changjiang estuary in the Holocenecan be derided into four development stages. |
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| Keywords: | Changjiang estuary mouth bars Holocene microfauna depositional environments |
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