【摘要】 沉积物的粒度结构受堆积地貌及水动力的大小、状态而制约。平均粒径和分选系数分别反映了水动力的大小和稳定状态;粒度概率曲线反映了沉积物被搬运的方式……。所有这些资料有助于沉积相的分析,进而可恢复出古地貌。我们在华北平原北部的滹沱河作了这一尝试,结果较为理想。更多还原

【Abstract】 The grain structures of sediments were limited by the sizes and shapes of accumulation form and river flow. The average size and sorting coefficient respectively indicate the size and stable state of the fluvial process. The grain size frequency diagram reflects the transport manner of sediments and so on. All of these data are useful for the analysis of sedimentary facies and reconstruction of palaeogeomorphology. We made an attempt to use the method of size analysis for the reconstruction of geomorphology in Hutuo river, northern China plain, and obtained good results更多还原