摘要
Based on a study and analysis of the stratigraphic section, the authors hold that the broad anticline and syncline are composed of Neogene red mudstone, which was formed through deformation. The Huangshui River fault was developed in the core of the anticline, as shown by the relationship between the folds and faults. The Huangshui River concealed fault was formed under the main pressure in northeast direction composed of two normal faults in the core of the anticline. The fault is on the slideway of Xining basin and belongs to a superficial fault, whose activity is not significant.