It exists 38 sedimentary cycles of palaeo-aeolian sands to its overlying fluvio-lacustrine facies or/and palaeosols in the Salawusu River valley of the southeast depression of the Mu Us Desert since 150 ka B.P. .

• 毛乌素沙漠东南部边缘萨拉乌苏河流域150 ka B.；P以来存在38个由风成砂丘与河湖相和古土壤构成的沉积旋迥。