| 下扬子区三叠纪古生物和古地理变迁及其主要原因 |
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| 引用本文： | 钱迈平,郭佩霞.下扬子区三叠纪古生物和古地理变迁及其主要原因[J].地质学刊,1996,20(3):156-165. |
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| 作者姓名： | 钱迈平 郭佩霞 |
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| 作者单位： | 中国地质科学院南京地质矿产研究所 |
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| 摘 要： | 根据下扬子区三叠系生物化石和沉积相的研究，该区三叠纪古地理环境先后经历陆表海，萨布哈潮坪－泻湖，下三角洲平原滨海河口湾及三角洲平原河，湖和沼泽一系列变迁，其主要原因是由于扬子板块从赤道以南附近持续向北进行跨气候带漂移抵达北回归线以北附近的结果。
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| 关 键 词： | 三叠纪 古生物 古地理 大陆漂移 下扬子区 |
The Evolution of Paleonotologic and Paleogeographic Faces in Triassic Period in the Lower Yangtze Valley and its Essential Cause |
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| Qian Maiping et al.The Evolution of Paleonotologic and Paleogeographic Faces in Triassic Period in the Lower Yangtze Valley and its Essential Cause[J].Jiangsu Geology,1996,20(3):156-165. |
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| Authors: | Qian Maiping |
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| Abstract: | The research on the paleonotologic and sedimentary faces in the Triassic System in the Lower Yangtze Valley, shows the evolution changes from an epicontinental sea, abundant in tropic marine organisms suck as ammonites, bivalves, gastropods, foraminifers, conodonts, asteoichthyes, ichthyosaurs and algae et al, to a high evaporative tidal flat, lagoons'or Sabkha, rich in stromatolital biostromes/bioherms built by salt-resistand algae et al, to a seaskord estury in lower delta plain plentiful or tropic-subtropic hemi-salt water bivalves et al, to rivers, lakes and marshlands in delta plain full of subtropic freshwater organisme, e.g. bivalves, ostracodes and plants et al. It suggests that the Yangtze Block, on the other hand, have moved from south by the Equator over climatic tapes to north by the Tropic of Cancer during Triassic Period. |
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| Keywords: | Evolution Paleonotologic face Paleogeographic face Triassic period Lower Yangtze Valley |
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