The Permian system of East Henan is well developed and widely distributed.
豫东二叠系发育良好，分布普遍。
Two stratigraphic units belonging to Cenozoic Group have. been found between the Permian System and the Quarternary Loess from Xiangshan hill terrain in Hancheng Mining Area.
在韩城矿区象山山地，于二叠系之上，第四系黄土之下，发现了两套属于新生界的地层单位。
The Mesozoic source rocks at the northern Tarim basin belong to argillaceous rocks of continental facies, which are mainly developed in the Permian System and Jurassic System.
塔里木盆地北部地区中生界生油岩为陆相泥质生油岩，主要发育在三叠系、侏罗系。有两个生油岩发育中心，库车坳陷区和阿瓦提断陷-满加尔坳陷区。
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