Mercury Valley (baishagou scenic spot) Baishagou geological landform was formed in the early Cretaceous. According to the experts in the industry, the neotectonic movement and the changes of paleoclimate and paleoenvironment were recorded in the sandstone sedimentary layer, showing the sedimentary changes of different climate and environmental conditions, forming a unique landform. Therefore, it has important scientific significance for the study of Zhangye sandstone sedimentology.