Since Benxi stage to now, the researched area has experienced continuous subsidence and burring during Hercynian Indosinian, then up lifed in Yanshan, disintegration in Himalayan, differential depression in Neotectonic period.

• 自煤系形成至今，本区经历了海西印支期的普遍沉降埋藏、燕山期的普遍抬升局部断陷、喜山期的剥蚀、新构造运动期的差异沉降等阶段。