早侏罗纪 meaning in English

mentoukou series

During my master " degree investigation , i mainly focused on the coarse - grain stratigraphy within mesozoic basins in chengde and pingquan districts , the eastern yanshan , and did systemic provenance analysis and paleo - current direction measurement and studied the relationship among basin evolution , volcanism and tectonism . then i summarized the mesozoic basin development and the coupling characters of basin and mountain . the evolution of basin and mountain in this area can be divided into several stages : the stage of compression uplift and flexural basin during the triassic through the early jurassic , the stage of structural compression - volcanism and foreland basin during the middle and late jurassic and the stage of rift basin in the cretaceous
在野外典型路线调查的基础上，对燕山地区东段承德、平泉地区的中生代盆地中发育的粗碎屑沉积层，进行了系统的物源分析与古流测定，并在此基础上重点剖析了盆地的发育、火山活动、构造变动三者之间的关系，总结了本区中生代盆地发育规律及盆山耦合特征，并将盆山演化划分为：三叠纪?早侏罗纪的构造挤压隆升与挠曲盆地发育阶段阶段，中晚侏罗纪的构造挤压?火山活动与类前陆盆地发育阶段，早白垩世的拉张断陷盆地发育阶段。