Relationship between the Malan Loess and the Salawusu Formation in the Salawusu River Area,Ordos,and Their Geological Ages

作     者：Li Baosheng Dong Guangrong Gao Shangyu Shao Yajun Lanzhou Desert Research Institute, Academia Sinica 

作者机构：Lanzhou Desert Research Institute Academia Sinica 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报(英文版))

年 卷 期：1988年第1卷第1期

页      面：29-43页

学科分类：07[理学] 

主　　题：Relationship between the Malan Loess and the Salawusu Formation in the Salawusu River Area,Ordos,and Their Geological Ages 

摘      要：In the middle and lower reaches of the Salawusu River. the Salawusu Formation regarded traditionallyas fluvio-lacustrine deposits actually includes a series of strata which mainly consist of eolian sandy depositsnamed as Chengchuan Formation by the authors. The eolian sand of the Chengchuan Formation and theMalan loess distributed in the upper reaches of the Salawusu River are deposits of sand and loess faciesformed by wind action during the same period. The relationship of the Chengchuan Formation and theMalan Loess with the Salawusu Formation which is really of fluvio-lacustrine deposits is that the formertwo superpose the latter. This can be demonstrated by the difference of the extinct species proportion of thefaunas in different strata. In this area. the Salawusu formed during the early period of Late *** the Malan Loess and the Chengchuan Formation deposited during the late period of the LatePleistocene.