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陕甘宁盆地中部马五1段由多个向上变浅的潮缘碳酸盐岩沉积序列重复叠置组成 ,并可分为十三种沉积 -成岩微相和六个沉积相带。这种沉积序列的韵律性重复叠置的形成方式为潮缘进积楔的简单退覆和阶段式退覆 ,其形成机制为自旋回
The section of Ma Wu 1 in the central part of the Shaan-Gan-Ning Basin is composed of a series of superimposed carbonate sedimentary series of upwardly shallow tidal pools superimposed and divided into thirteen sedimentary-diagenetic microfacies and six sedimentary facies belts. The rhythmic overlap superposition of this sedimentary sequence is formed by simple and progressive depostion of tide-influx wedge and its formation mechanism is spin-back