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毛乌素沙漠萨拉乌苏河流域米浪沟湾剖面与MIS3相当的MGS3地层段中33LS,35LS,37FL和39LS的腹足类—陆生蜗牛和淡水螺类化石,经鉴定为11种,隶属于8科10属.可以划分为:(1)旋螺属-土蜗螺属组合,主要成员是凸旋螺Gyraulus convexiusculus,西伯利亚旋螺Gyraulus sibiricus,小土蜗Galba pervia,奇异土蜗Galba superegra Gredler等;(2)瓦娄蜗牛属组合,主要成员有伸展瓦娄蜗牛Vallonia patens,白云石虹蛹螺Pupilla muscorum,浅圆盘螺Discus pauper等陆生螺类.依据年代测试结果和这些化石现生种的生活习性、栖息环境及地理分布,研究认为,33LS,35LS,37FL,39LS依次距今为26000,29000,33000和38000a,其在时间与气候特点上与格陵兰冰芯GRIP-4,5,6,10间冰段具有较好的对比关系,33LS,35LS,39LS代表了非常温暖湿润时期,37FL次之;MGS3记录的这4个时期的气候波动与MIS3间冰阶全球气候背景下东亚夏季风对毛乌素沙漠的强烈影响有关.
The population of 33LS, 35LS, 37FL and 39LS gastropods - terrestrial snail and freshwater snail fossils in the Meisonggouwan section of the Mualaigou section of the Salawusu River basin in the Muusu Desert are identified as eleven 8 families and 10 genera.It can be divided into: (1) The combination of the genus Cyclotella and the genus Cochinchina, the main members are Gyraulus convexiusculus, Gyraulus sibiricus, Galba pervia, Galba superegra Gredler, etc. ; (2) Valais snail genus assemblage, whose main members are Vallonia patens, Pupilla muscorum, Discus pauper, etc. According to the age test results and these fossil species Habitat, habitat and geographical distribution. According to the study, 33LS, 35LS, 37FL and 39LS are 26000, 29000, 33000 and 38000a in sequence with the Greenland ice core GRIP-4, 5 and 6 , 10 ice sections have good contrast relationship, 33LS, 35LS, 39LS represent the very warm wet period, 37FL second; MGS3 recorded the four periods of climate fluctuations and the MIS3 intergalactic global climate background of the East Asian summer monsoon The strong impact on the Mu Us Desert.