The Qinjiamiao Group in the Yangtze Gorge area is mainly composed of thin-bedded dolostones.
三峡地区覃家庙群以一套缺乏化石的薄层白云岩沉积为特征。
Soft and thin-bedded characteristics and dynamic load action from mining and blasting shock are some basic features of the actual mining roadways in coalmine.
围岩松软、呈层性显著以及受爆破震动和开采动载的反复作用是回采巷道的基本特征。
The upper part is a set of evaporite quasi-tidal sequence with clear cycles which is made up of middle-thin-bedded, gypsum-bearing muddy limestone and dolomicrite.
上部为中薄层状富泥的含石膏质夹层的泥质泥晶灰岩、微晶白云岩组成的旋回性清楚的似蒸发潮坪层序。
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