云冈石窟地区云冈组上段砂岩中碳酸盐胶结物的含量普遍在10%以上，其主要矿物成分为含铁方解石和含铁白云石。
Carbonate cement is universally more than 10% in sandstones of the upper Yungang formation in Yungang Grottoes area. It's mainly composed of ferriferous calcite and ferriferous dolomite.
碳酸盐胶结的主要类型是方解石胶结，同时也含有少量的铁方解石和极少量的铁白云石胶结。
The main type of carbonate cement was calcite cementing, with little ferrocalcite cement and rare ferrodolomite cement.
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