黄河中游地区,二选系上部和三选系下部红色砂页岩层分布有一定范围。山西、陕西两省的碛口、军渡和龙门舌头岭坝段,河南省小浪底坝段以及支流汾河流域五马坝址,沁河张峰坝址都位子这套红色地层上。在这套地层上,已建成的水库工程有汾河上文峪河水库,涺水河薛峰水库,尚未建成的有沁河张峰水库等(图1)。三十年来在以上各坝址作了大量的地质勘测试验研究工作。本文 In the middle reaches of the Yellow River, there is a certain range of red sand shale distribution in the upper part of the second election system and the lower part of the third election system. Shanxi and Shaanxi provinces Qikou mouth, military crossing and gantry tongue Lingba, Henan Province Xiaolangdi dam tributaries of the Fen River and Wuma dam site, Qinfeng Zhang Feng dam sites are located on the red layer. In this set of strata, the completed reservoirs include Wenyuhe Reservoir of Fenhe River, Xuefeng Reservoir of Qushuihe River, and Zhangfeng Reservoir of Qinhe River that have not yet been completed (Figure 1). Over the past 30 years, a great deal of geological survey and research work has been done at the above dam sites. This article