摘要
通过对黄河上游官亭盆地地貌及古文化遗址的野外考察,分析了盆地中黄河二级阶地的结构,认为该阶地形成于全新世中期。距今4000年左右的史前洪水阶地上加积了一层平流沉积物,形成复合型阶地,其下部为基座阶地,上部为上叠阶地。
<Abstrcat>Through the field research of landform and cultural sites in Guanting basin of the upper reaches of the Yellow River in Qinghai Province, the authors analyzed the structure of the second terrace of Guanting basin and concluded that the second terrace came into being in middle Holocene. The second terrace turned into a complex terrace because of the slackwater sediments caused by the Yellow River's flood in late Holocene.
出处
《水土保持研究》
CSCD
北大核心
2005年第4期33-34,共2页
Research of Soil and Water Conservation
基金
国家教育部博士点基金(编号:20030001100)
关键词
黄河上游
官亭盆地
全新世早中期
二级阶地
the upper reaches of the Yellow River
Guanting basin
early and middle Holocene
second terrace
