前言渭河谷地人烟稠密,是我国西北王、农业重点建设区之一。有目的地研究该区黄土地层的时代、成因、成分、物理力学性质以及岩石特征,对生产实践和理论研究具有重要意义。一、区域地质地貌概况研究区位于渭河北岸,地处渭河第三级高阶地的前缘(图1),由之向北地势逐渐抬 Preface Weihe Valley densely populated, is China’s northwestern king, one of the key agricultural areas. Studying purposely the age, genesis, composition, physical and mechanical properties and rock characteristics of the loess strata in this area is of great significance to production practice and theoretical research. I. Overview of Regional Geology and Geomorphology The study area is located on the north bank of the Weihe River and is located in the front edge of the third-order high-grade Weihe River (Figure 1)