Pa elements , this article described two important pa elements of 鉴于在晚二叠世至早三叠世,
Substance sources of rare - earth elements in late permian coal seams on coal mines in bijie 毕节煤矿区晚二叠世煤层稀土元素的物质来源
Thermoevolutional characteristics of hydrocarbon generation from barkinite , late permian coals in shuicheng , guizhou province 贵州水城晚二叠世树皮体成烃的演化特征
The post - salt sediment group formed ( upper permian to quaternary ) is composed mainly of clastic rocks , with carbonates locally 晚二叠世以后形成的盐上层系沉积,主要?碎屑岩,在局部地区有碳酸盐岩。
Conodont fauna of late permian to early triassic in leping area , jiangxi province conodont fauna of late permian to early triassic in leping area , jiangxi province 江西乐平地区晚二叠世-早三叠世的牙形石动物群