The crust basement of Jiuhuashan was formed 800 million years ago. The stable platform uplifted to land 250 million years ago. The intense crustal activity happened with two stages of magmatism in Jiuhuashan area 140 million years ago, and the largest granite rock body in the East Asian was formed, which is sign of the stable continent reactivation. Because of Himalayan movement, Jiuhuashan Grand Fault made splendid fault-block mountains since the 65 million years ago. The complete geomorphologic pattern of mountain-hill-basin and abundant biodiversity were created because of tens of millions of years function of flowing water and glacier and structural activities.
The crustal crystalline basement of Jiuhuashan was formed during Jinning movement of the Neoproterozoic about 800 million years ago, and sedimentary cover was formed during the Early Paleozoic of Cambrian and Ordovician ranging from 540 to 460 million years ago.
The local crust began to uplift about 250 million years ago and the Paleozoic sedimentary strata were gradually weathered and eroded off.
Collision between Eurasian plate and Pacific plate happened during the Cretaceous of 140 years ago, and the intermediate-acid magma was produced and upwelled to form Qingyang massif.
Plates collision continued during the Cretaceous of about 120 million years ago, acid magma formed in the upper crust and the basic magma formed in the deep crust. And magmas upwelled into the Qingyang massif and condensated into Qingyang-Jiuhua complex massif with various dykes.
Because of Jiuhua fault activity, Jiuhuashan fault-block granitic landform was formed during the Cenozoic from 65 million years ago. The up-throw side of the fault uplifted to form granitic peak clusters and the down-throw side descended to form hills and basins resulting from erosion, weathering and accumulation.
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