| 青海西宁盆地三趾马、副板齿犀化石的发现及意义 |
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| 关键词:Xining basin first found Hipparion fossils Parelasmotherium fossils Late Miocene |
| 基金项目:中国地质调查局地质调查项目(编号: 1212011087114; 12120113006100) |
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| Discovery and Significance of Hipparion and Parelasmotherium Fossils in the Xining Basin, Qinghai Province |
| Hipparion and Parelasmotherium fossils buried in the Neogene sediments in the Xining basin of Qinghai Province have been discovered for the first time. This paper descries in detail characteristics of the fossils and lithostratigraphic characteristics. Primary identification suggests that the Hipparion fossils belong to Hipparion dongxiangense. Combined with the regional geology and previous studies, the authors believe that the sediments belong to the Xianshuihe Formation or overlying strata and are early Late Miocene in age. The primary palynological studies suggest that the Late Miocene vegetation there was composed of mixed evergreen and deciduous broad-leaved forests. The angiosperms were dominant in the study area. The climate was arid in the Xining basin during Late Miocene. The vegetation succession was changing from forest to steppe, suggesting an arid area of the subtropical zone with increasing aridity. This study tried to explore the regional lithostratigraphic characteristics and sedimentological features. By comparing with other mammuthus fossils from the central part and the northeastern edge of the Tibetan Plateau as well as those from North China, this study is of great importance for rebuilding the environmental evolution of Miocene sediments in the Xining basin. |
| HAN Jian-en,SHAO Zhao-gang,CHEN Qi-guang,MENG Xian-gang,ZHU Da-gang,ZHANG Qian-qian,QUAN Kai,WANG Jin,XU Biao.2015.Discovery and Significance of Hipparion and Parelasmotherium Fossils in the Xining Basin, Qinghai Province[J].Acta Geoscientica Sinica,36(1):115-120. |
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