early-middle permian

常见例句

Intracontinental extension tectonics process occurred in Middle Carboniferous-Early Permian which formed a lot of volcanic rocks.
中石炭世一早二叠世，本区进入造山后的陆内伸展作用阶段，并发育大量火山岩。
geology.nju.edu.cn
Based on an analysis of the conodont biofacies, it is inferred that there was probably a deep-sea basin facies sedimentary environment in the Wenguer area during the early Middle Permian.
通过牙形石生物相分析，推断温古尔地区中二叠世早期可能为盆地相较深水沉积环境。
During the Middle-early Late Permian the epicontinental sea contracted and evolved into a paralic inland depression in the study area and alluvial fan, river, delta and lake facies were formed.
中二叠世至晚二叠世早期陆表海萎缩，本区演变为近海内陆坳陷充填，形成冲积扇、河流、三角洲、湖泊沉积；