【摘 要】
：
2000年作者在进行黄河中上游河谷阶地考察时,在兰州刘家峡水库西侧祁家大坡公路边路堑壁上,发现一古象门齿化石.化石产出剖面位于黄河Ⅵ级阶地后缘,其海拔高度为1880ｍ,拔河228
【机 构】
：
中国地震局兰州地震研究所,中国地震局兰州地震研究所,中国地震局兰州地震研究所,兰州大学 甘肃兰州730000,甘肃兰州730000,甘肃兰州730000,甘肃兰州730000
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2000年作者在进行黄河中上游河谷阶地考察时,在兰州刘家峡水库西侧祁家大坡公路边路堑壁上,发现一古象门齿化石.化石产出剖面位于黄河Ⅵ级阶地后缘,其海拔高度为1880ｍ,拔河228ｍ.阶地为基座阶地,剖面描述如下:基座为前震旦纪变质岩系;上覆洪积砾石层,厚约5～10ｍ,向东延伸相变
In 2000, during the investigation of the terrace of the valley in the middle and upper reaches of the Yellow River, the author found a paleo-edentulous fossil on the cutting wall of the side slope of Qijia Dapo Highway on the west side of the Liujiaxia Reservoir in Lanzhou, where the fossil output profile is located on the trailing edge of the Ⅵ terrace of the Yellow River. The height is 1880m and the tug-of-war is 228m. The terraces are the base terraces. The sections are described as follows: The base is a pre-Sinian metamorphic rock series; overlying the alluvial gravel layer is 5 ~ 10m thick and extends eastward
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