trias meaning in English

n.,adj.
【地质学；地理学】三叠纪[系](的)。

At the same time , i discussed the tectonic - sedimentary configuration , sedimentation and sequence evolutive character of the northeast sichuan foreland basin in the xujiahe age , late trias . in conclution , i drawed the following conclusions
在此基础上，深入讨论和论证了川东北前陆盆地晚三叠世须家河期沉积盆地的构造?沉积格局，以及沉积、层序演化特征。
Past investigation found the rock in the right dam foundation composing of granite ( _ 4 ~ 3 _ 5 ~ 1 ) in dyas - trias , which has a very complicated mechanical environment . the complicated phenomenon is as follows : tectonism , alteration , rock mass demobilize , rock mass stress release and other factors . because of this several weakness rock zones and a loosen rock mass zone are develop in the right dam foundation
前期的调查表明其右岸岩体力学环境复杂，表现为：构成右岸坝基(肩)岩体主体的二迭三迭纪花岗岩( _ 4 ~ 3 _ 5 ~ 1 )受构造变动、蚀变、风化卸荷等因素的影响形成了坝基软弱岩带和坝肩上部卸荷松弛岩体。