| 贵阳乌当下奥陶统湄潭组遗迹化石及其古环境意义 |
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| 引用本文： | 杨式溥,戎昆方.贵阳乌当下奥陶统湄潭组遗迹化石及其古环境意义[J].现代地质,1988(3). |
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| 作者姓名： | 杨式溥 戎昆方 |
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| 作者单位： | 中国地质大学
(杨式溥)，贵州工学院(戎昆方) |
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| 摘 要： | 本文系统研究了贵阳乌当下奥陶统湄潭组遗迹化石,认为这些遗迹化石系风暴沉积前后的产物,并首次在我国发现cruzianc furcifera 遗迹组合,这对于地层对比,遗迹组合的地理分布均有重要意义.
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| 关 键 词： | 湄潭组 遗迹化石 风暴沉积 |
TRACE FOSSILS FROM LOWER ORDOVICIAN MEITAN FORMATION IN WUDANG, GUIYANG AND THEIR ENVIRONMENTAL SIGNIFICANCE |
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| Yang Shipu.TRACE FOSSILS FROM LOWER ORDOVICIAN MEITAN FORMATION IN WUDANG, GUIYANG AND THEIR ENVIRONMENTAL SIGNIFICANCE[J].Geoscience——Journal of Graduate School,China University of Geosciences,1988(3). |
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| Authors: | Yang Shipu |
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| Institution: | Yang Shipu(China University of Geosciences)Rong Kunfang(Guizhou Institute of Technology) |
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| Abstract: | The lower Ordovician trace fossils described herein were first found in Wudang, Guiyang. They contain 10 ichnogenera, 11 ichnospecies, of which 2 ichnospecies are new(Limulicubichnus wudangensis ichnosp.nov. Yang, and Cru-ziana wudangensis ichnosp.nov.Yang.). Trace fossils of the Meitan Formation are of storm-related ichnofacies, containing two different trace fossil associ-ations. The Skolithos ichnofacies, consisting of Skolithos ichnosp. and Diploce-raterion ichnosp., in the lower part of the Meitan Formation. The Cruziana. ichnofacies, containing Cruziana furcifera D'Orbigny, Cruziana wudangensis ichnosp. nov. Yang, Phycodes cf. Circinatum Richter, Limulicubichnus wuda-ngensis ichnosp.nov. Yang, Lockia siliquaria James, in the upper part of Mei-tan Formation. The Skolithos ichnofacies represents the flourishing of a com -munity of opportunistic organisms with low-diversity in an environment of unstable high stress. The Cruziana ichnofacies represents a stable benthic community with a high diversity. |
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| Keywords: | : Meitan Formation trace Fossil storm deposits |
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