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萨拉乌苏组是由法国人P .德日进和E .桑志华早年建立的我国北方晚更新世河湖相标准地层 ,但在时代归属上一直存在分歧 .通过萨拉乌苏河滴哨沟湾剖面地层层序划分和年代测定 ,结合黄土_古土壤研究的最新成果 ,初步建立了可与黄土、深海沉积记录和冰期气候对比的萨拉乌苏地层序列 .认为河湖相的萨拉乌苏组形成于 1 40～ 70ka ,城川组风成沙形成于 70～ 1 0ka ,湖沼相大沟湾组发育于 9 7～ 3 8ka和滴哨沟湾组形成于 3 8ka以后 ,并可与黄土高原S1、马兰黄土和S0 及深海氧同位素 5～ 1各阶段相对应 .
Sara Wusu Formation is a standard strata of late Pleistocene rivers and lakes in northern China established by the French P. de Rijin and E. Sang Zhihua, but there are always differences in the ownership of the times. Based on the sequence stratigraphic division and dating of the Seomigou Bay profile and the latest achievements in the study of loess-paleosol, the sequence of the Sara-Usu stratigraphy that can be compared with the loess and deep-sea sedimentary record and glacial climate was initially established. The Lausu Formation formed from 140 to 70 ka, the chengcheng formation of Chengchuan Formation formed from 70 to 100 ka, the lacustrine-facies Ogouwan Formation developed from 97 to 38 ka, and the YMDG formation formed after 38 ka Which corresponds to the stages of Loess Plateau S1, Malan Loess, S0 and deep sea oxygen isotope 5 ~ 1.