Deep buried dolostones in study areas mainly consist of fine or medium dolomites, which crystals are euhedral or subhedral. 认为研究区深埋藏白云岩主要由细晶或中晶白云石组成，白云石呈自形或半自形晶。
Middle-Upper Cambrian dolomites in Shimen,Hunan Province,are mainly composed of anhedral micritic dolomite,euhedral and subhedral granular dolomites,grain dolomite. 湖南石门中上寒武统白云岩极其发育,类型多样,不同类型的白云岩其成因机理和白云石化模式各不相同。
