民和盆地下白垩统上部的红古城组是一个多次受洪水作用而形成的多层楼式的旋回序列 ,它以水下沉积构造和水上暴露构造频繁交互的沉积为特征 ,早期与晚期的洪水规模也存在很大异同 ,代表了滨湖至岸上洼地的沉积环境。环境相与作用相结合分析 ,大大深化了红古城组沉积作用及其构造背景分析 ,反映红古城组是盆地构造演化加速萎缩时期的产物。两者是陆相盆地相分析不可缺少的组成部分 The Hongguchengcheng formation in the lower Cretaceous of Minhe Basin is a multi-storey cyclonic sequence formed by multiple floods. It is characterized by sedimentary facies with frequent interaction between underwater sedimentary structures and water-exposed structures. Early and late The scale of the flood there is very similarities and differences, representing the sedimentary environment of the shore to the shore depression. The combination of environmental facies and effects has greatly deepened the sedimentation and structural tectonic background analysis of the Honggucheng formation, reflecting that the Honggucheng formation is the product of the tectonic evolution in the basin during the period of accelerated shrinkage. Both are indispensable components of facies analysis in the continental basin