Field investigation and previous studies about the Cenozoic gravel beds in the piedmont of Lüliang Mountains have indicated that these gravel beds are characterized by the following: 1) the gravel beds, which always go with Lüliang Mountains but scarcely go beyond the Huanghe (Yellow) River valley, extend further in parallel than in vertical direction of the mountains; 2) the gravel beds show a asymmetric wedge shape(thicker in the east) in E-W direction, and have smaller granularity, better gradation and psephicity in the west; and 3) the composition of gravels is relatively unitary but varying in the different locations. It is originated mainly from the bedrock in the adjacent