| 甘肃第四纪地层的划分 |
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| 引用本文： | 曹兴山,屈君霞,赫明林,曹炳媛.甘肃第四纪地层的划分[J].甘肃地质学报,2004,13(1):16-37. |
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| 作者姓名： | 曹兴山 屈君霞 赫明林 曹炳媛 |
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| 作者单位： | 甘肃省地矿局水文地质勘察院,甘肃,张掖,734000;甘肃省地矿局水文地质勘察院,甘肃,张掖,734000;甘肃省地矿局水文地质勘察院,甘肃,张掖,734000;甘肃省地矿局水文地质勘察院,甘肃,张掖,734000 |
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| 摘 要： | 本文依据新构造运动特征与地层接触关系、古地理环境与岩石地层特征、哺乳动物化石种属与产出层位、古地磁与14C测试成果,用多重地层划分概念对第四纪各统进行划分。厘定第四纪下限为2 48Ma·B·P;中更新世下限为0 73Ma·B·P;晚更新世下限为0 20Ma·B·P;早全新世下限为12 0Ka·B·P;中全新世下限为7 0Ka·B·P;晚全新世下限为2 5Ka·B·P。
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| 关 键 词： | 第四纪下限 磁性地层 岩石地层 动物群 古地理环境 |
THE DIVISION OF QUATERARY STRATIGAPHIC IN GANSU |
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| CAO Xing-shan,QU Jun-xi,HE Ming-lin and CAO Bing-yuan.THE DIVISION OF QUATERARY STRATIGAPHIC IN GANSU[J].Acta Geologica Gansu,2004,13(1):16-37. |
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| Authors: | CAO Xing-shan QU Jun-xi HE Ming-lin and CAO Bing-yuan |
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| Institution: | (Instiute of Hydrogeology and Engineering Gelology, Gansu Provincial Bureau of Geology and Mineral Exploration and Development, Zhengye 734000,China) |
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| Abstract: | According to the character of neotectonism and the relationship of stratigraphic
contact, paleogeographic environmental and rock-stratigraphic features,genus mammal fossil and
occurrence stratohorizon, paleomagnetism and test result of14C, though dividing Quaternary Peri-
od by the multiple conception. We conclude that the Quaternary lower limit is 2·48 Ma·B·P,me-
dian Pleistocene Epoch lower limit is 0·73 Ma·B·P,late-Pleistocene Epoch lower limit is 0·20
Ma·B·P,lower Holocene Epoch lower limit is 12·0 Ka·B·P,median Holocene Epoch lower limit
is 7·0 Ka·B·P,late-Holocene Epoch lower limit is 2·5 Ka·B·P |
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| Keywords: | Quaternary lower limit Magnetostrtigraphic Rock-stratigraphic fauna Paleogeographic environmental |
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