from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity
Adjective:
of or relating to or denoting the first period of the Mesozoic era
例句
用作名词 (n.)
The Triassic and Cretaceous volcanisms in the southeast and southwest Guangxi were active. 桂东南和桂西南地区中生代三叠纪和白垩纪的火山活动活跃。
The paleozoic source rock in North China went into the main oil generating period at the end of Triassic. 华北地区古生界生油岩在三叠纪末已进入主要生油期。
The clastic rocks widespread in the Triassic Xikang Group in western Sichuan consist dominantly of turbiditic flysch formations. 摘要三叠系西康群碎屑岩主体为一套浊积岩复理石建造。
The middle Triassic reservoir in south Tahe area is characterized by high porosity and good permeability, but with strong anisotropy and considerable lateral changes. 摘要塔河南探区三叠系中油组储层孔隙度高，渗透性好，但非均质性强，横向变化剧烈。
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