... upper part of stage ==> 舞台上空 upper Permian series ==> 上二叠统 upper photic zone ==> 上透光层 ...
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上二叠统-三叠系 upper persian-triassic
Lithofacies analysis indicates that mid-upper Permian series in the study area comprises mainly bioclast limestone,micrite,calcrenite,calcirudite,silicolite,etc.
岩相分析表明,研究区中-上二叠统主要由生物碎屑颗粒灰岩、泥晶灰岩、砂屑灰岩、砾屑灰岩、硅质岩等组成。
参考来源 - 湖北秭归兴滩二叠系沉积及演化特征·2,447,543篇论文数据，部分数据来源于NoteExpress
本文认为盆地东部地区的油源层主要是上二叠统。
We consider that the oil source bed in the east of Junggar Basin is mainly of the upper Permian series.
但在海槽相区上二叠统不发育生物礁，飞仙关组缺乏鲕粒岩。
But no organic reefs were developed in the Upper Permian and the Feixianguan Formation is lack of oolite.
本文根据川东的勘探，总结了上二叠统长兴组潜伏生物礁的特征。
According to the exploration in Eastern Sichuan, the characteristics of the hidden organic reefs in Changxing formation of Upper Permian is summarized in this paper.
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