| 祁连山中寒武统牙形石 |
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| 引用本文： | 崔智林,余向阳. 祁连山中寒武统牙形石[J]. 地质通报, 1997, 0(1) |
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| 作者姓名： | 崔智林 余向阳 |
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| 作者单位： | 西北大学地质系和分析测试中心 |
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| 摘 要： | 青海大通中寒武统毛家沟群产丰富的牙形石，共有７属８种，以原牙形石Ｊｉａｎｇｓｈａｎｏｄｕｓａｆ．ｔｒｉａｎｇｕｌｕｓ、Ｇａｐｐａｒｏｄｕｓｂｉｓｕｌｃａｔｕｓ、Ｐｈａｋｅｌｏｄｕｓｔｅｎｕｉｓ占优势，而副牙形石Ｗｅｓｔｅｒｇａａｒｄｏｄｉｎａ、Ｐｒｏｏｎｅｏｔｏｄｕｓ仅有少数个体。与华北和华南相比，这一组合所含副牙形石的比重明显降低，而且缺乏Ｌａｉｗｕｇｎａｔｈｕｓ、Ｆｕｒｎｉｓｈｉｎａ等类型（图版１）。
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| 关 键 词： | 牙形石 中寒武世 祁连山 |
MIDDLE CAMBRIAN CONODONTS FROM THE QILIAN MOUNTAINS |
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| Cui Zhilin. MIDDLE CAMBRIAN CONODONTS FROM THE QILIAN MOUNTAINS[J]. Geologcal Bulletin of China, 1997, 0(1) |
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| Authors: | Cui Zhilin |
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| Abstract: | There occur abundant conodonts in the Middle Cambrian Maojiagou Group in Datong county, Qinghai province.They include 7 genera and 8 species.The fauna is characterized by predominance of the protoconodonts Jiangshanodus aff. triangulus, Gapparodus bisuleatus and Phakelodus tenuis, only a few individuals of the paraconodonts Westergaardodina sp. and Prooneotodus sp. being present. In comparison with North China and South China,the proportion of paraconodonts in this assemblage decreases notably and Laiwugnathus and Furnishina are lacking. |
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| Keywords: | conodont Middle Cambrian Qilian Mountains |
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