| 贵州贵阳地区下三叠统凝缩段的遗迹化石特征 |
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| 引用本文： | 王尚彦.贵州贵阳地区下三叠统凝缩段的遗迹化石特征[J].沉积与特提斯地质,1997,17(2):58-62. |
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| 作者姓名： | 王尚彦 |
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| 作者单位： | 贵州区域地质调查研究院 |
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| 摘 要： | 贵阳地区下三叠统是一个完整的碳酸盐岩层序（相当于三级旋回层序）．该层序中的凝缩段由深色薄层（单层厚0．5cm～1cm）的泥晶灰岩和泥质条带灰岩组成．凝缩段中产丰富的遗迹化右．该遗迹群落为：Cochlichnus,Cosmorhaphe,Chondrites,Gordia,Huaxich－nus，Oldhamia,Phycosiphon.Protopaleodictyon,Pinnatpedus,Mammillichnus,Neonerites和生物扰动构造．遗迹化石组合与Nereites遗迹相相似。此外，文本还讨论了此遗迹群落的形成原因。
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| 关 键 词： | 凝缩段 遗迹化石 下三叠统 贵阳地区 |
TRACE FOSSILS FROM THE LOWER TRIASSIC CONDENSED SECTIONS IN THE GUIYANG DISTRICT,GUIZHOU |
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| Wang Shangyan.TRACE FOSSILS FROM THE LOWER TRIASSIC CONDENSED SECTIONS IN THE GUIYANG DISTRICT,GUIZHOU[J].Sedimentary Geology and Tethyan Geology,1997,17(2):58-62. |
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| Authors: | Wang Shangyan |
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| Institution: | Reional Geological Survey and Research Institute, Guizhou Bureau of Geology and Mineral Resources |
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| Abstract: | The Lower Triassic strata in the Guiyang district represent an uninterrupted carbon-ate sequence corresponding to the third-order cyclic sequence. The condensed sections inthe carbonate sequence consist of dark alternating laminations (O. 5-1 cm thick for individ-ual laminae) of micritic limestones and muddy banded limestones, where abundant tracefossils have been found, including Cochilichnus, Cosmorhaphe, Chondrites, Gordia, Gloeleri-a, Huaxichnus, Oldhamia, Phycosiphon, Protopaleodictyon, Pinnatpedus, Mammillichnus.Neonerites and bioturbated structures, These trace fossil assemblages are similar to theNereites ichnofacies- The author in this paper gives a more detailed explanation of the gene-sis of the above-mentioned ichnocoenoses- |
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| Keywords: | condensed section trace fossil Lower Triassic Guiyang district |
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