Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Geography and Geo-Information Science》 2007-01
Add to Favorite Get Latest Update

Formation Age of the Highest Terrace of the Yellow River in Baode Area

LIU Yun-ming,LI You-li(College of Environmental Sciences,Peking University,Beijing 100871,China)  
Based on detailed field investigation,six terraces in Baode area were found,and the fourth one is the most well-developed.The highest terrace that is covered by Late Tertiary red clay is the oldest one.The lithology of gravel on sixth terrace mainly is limestone,secondly is sandstone,similar with T4 which belongs to ancient Yellow River.The authors conjecture the Late Tertiary terraces belong to ancient Yellow River.Magnetostratigraphy study shows that the bottom age of Moshangou section is about 6.5 Ma.Jijiagou section which was already studied has similar result,so the formation age of the oldest terrace in Baode area is about 6.5 Ma.However,red clay and tectonics study indicate that the Yellow River around Ordos block probably came into being as the uplift of northeastern margin of Qinghai-Tibetan Plateau at about 8 Ma.
【Fund】: 国家自然科学基金项目(40071016)
【CateGory Index】: P931.1
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved