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纹泥反映了湖相沉积物中特有的沉积韵律，是气候的季节变化和年际变化的产物。山西榆社张村地区上新世晚期的湖心相沉积中发育了极为完好的纹泥剖面。纹泥深浅相间形成清晰的纹理，分别代表夏秋和冬春。一深一浅组成一对，代表一年。纹泥层的单层厚度平均为0．12—0．25mm／条，薄者＜0．1mm／条，厚者可达0．3mm／条。暗色纹泥层的厚度大于浅色纹泥层。暗色纹泥的有机质含量丰富，木本植物孢粉占优势，同时CaO的含量低；浅色纹泥恰好相反。湖相纹泥具有建立高分辨率时间标尺和环境演化序列的特殊优越条件。
Mud mud reflects the sedimentary rhythms unique to lacustrine sediments and is a product of seasonal and climatic changes in the climate. Zhang Yushe, Zhangcun area in the late Pleistocene lacustrine facies developed a very good profile of muddy section. Dark muddy shades to form a clear texture, representing summer and winter and spring. A pair of deep and shallow to form a pair, on behalf of a year. The average thickness of the monolayer of the grain layer is 0.12-0.25mm / strip, thinner <0.1mm / strip and thickness of 0.3mm / strip. Thick dark muddy layer thicker than light colored mud layer. Dark muddy mud rich in organic matter content, woody plant pollen dominant, while the low content of CaO; pale muddy exactly the opposite. Lacustrine mud has the special advantages of establishing high-resolution time scales and environmental evolution sequences.