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高坝洲水电枢纽坝基地层沉积在一个蒸发盐—碳酸盐型潮坪环境中，其中所含软弱夹层是在差异升降运动中产生剪切性裂隙的基础上发展形成的、根据夹层所含了物和围岩岩性恢复的夹层原岩共有５类，相应夹层分别称为记状白云岩型夹层、迭层石白云岩型夹层、粒泥（或泥粒）岩型夹层、颗粒岩型夹层和粉砂岩型夹层。各种不连续界面与沉积环境有关。潮上潮间坪是夹层裂隙形成的优势相带。潮下浅滩基本是纯净的碳酸盐沉积，不利于夹层裂隙的形成。潮坪环境单调，后期差异升降运动轻微，对坝基岩层的力学强度和封闭性能不会构成大的威胁。
The dam foundation of the Gaobazhou Hydroelectric Project is deposited in an evaporite-carbonate tidal flat environment. The weak intercalated layers in the Gaobazhou Hydroelectric Dam are developed and formed on the basis of shear fractures during differential ascent and descent. There are five types of intercalated protoliths in the lithologic recovery of the object and the surrounding rock. The corresponding intercalations are called diagenetic dolomite-type intercalations, laminated dolostone-type intercalations, granulite (or mudstone) interbed, Mezzanine and siltstone mezzanine. Various discontinuous interfaces are related to sedimentary environment. Tidal tidal flat is the dominant facies belt formed by intercalated fissures. Basalt is basically a pure carbonate deposition, is not conducive to the formation of interbed cracks. The tidal flat environment is monotonous, and the slight differential rise and fall movement in the later period does not pose a big threat to the mechanical strength and the sealing performance of the dam foundation rock.