The tectonic framework of North Qilian in Early Ordovician should be similar to that of the Bafin Bay and the Queen Elizabeth Islands.
北祁连早奥陶世海域与现在加拿大北部巴芬湾及伊丽莎白女王群岛的构造格局相似。Late Ordovician organic reefs composed of cyanophyta and calcareous sponge were firstly discovered in northern Tarim basin.
在塔里木盆地北部首次发现了主要由蓝绿藻和钙质海绵组成的晚奥陶世生物礁。late Ordovician volcanic-subvolcanic formation.
晚奥陶世熔岩-次火山岩组。The China paleo-plates splitted into North China and Yangtze paleo-plates and Qinling limited ocean basin in middle Ordovician Epoch.
显生宙以来，古中国板块裂解为华北、扬子古板块，秦岭有限洋盆的时期为中晚奥陶世。In latest Middle Ordovician, affected by Qilian ocean closed, this cold rift vanished because of the reformation.
中奥陶世末期，随着北祁连古洋盆的逐渐关闭，该冷裂谷遭受改造而消亡。In addition, in the late Ordovician, Carboniferous and Silurian, tazhong area may have small-scale volcanic activity.
此外，中晚奥陶世、志留纪和石炭纪也可能发生过小规模的火山活动。One day two scholars came to the temple, Tao Shiliang and Zhang Zhiting.
一天，两个学者，陶世良和张志廷去庙里游玩。Sedimentary Successions and Environments of the Late Ordovician Wenchang Formation in Tonglu, Zhejiang
浙江桐庐晚奥陶世晚期沉积层序和沉积环境分析Geochemical characteristics of paleoseawater from the Early Ordovician of Yangtze Craton: Evidence from the trace elements in conodonts
扬子克拉通早奥陶世古海水地球化学特征：来自牙形石微量元素的证据