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泥河湾盆地中部的钱家沙洼洞沟剖面揭露了晚上新世-早更新世(2.90-1.51MaB.P.)的连续沉积,通过对年代地层学、沉积旋回、介形类组合以及碳氧同位素组成的分析,表明晚上新世沉积环境以浅湖和河流交替为特征,之后浅湖环境稳定,G/M界线和0lduvai极性亚时底界处出现明显的地质事件。
The Qianjiashawa Trough section in the middle part of the Nihewan Basin revealed the continuous deposition of the Late Pliocene-Early Pleistocene (2.90-1.51MaB.P.). By analyzing the age stratigraphy, sedimentary cycles, The analysis of the composition and the composition of carbon and oxygen isotopes shows that the sedimentary environment of the Late Pliocene is characterized by the alternation of shallow lakes and rivers. After that, the shallow lake environment is stable, and obvious geological events occur at the G / M boundary and the subzero boundary of 0lduvai.