Those of the fluvial facies, especially the lacustrine facies and palaeosols, are mainly composed of very fine sands and also contain some quantities of silt and clay.
河流相、特别是湖沼相与古土壤以极细砂含量占优势，且具一定含量的粉砂和粘土。
2
The degrees of the rubification of that red palaeosols were evaluated, and the advantages and disadvantages of the soils for agricultural utilization were also discussed.