The NE-NNE trending western Guangdong nappe zone extends along LuodingYunfu-Qingyuan-Yingde for 350 km, forming an arc bending towards the southeast.It was thrust from northwest to southeast with a distance of more than 40 km.The allochthon consists of the Presinian, Sinian and Cambrian system.The autochthon comprises the Devonian and Carboniferous system.It was mainly formed in the Hercynian and Indosinian epoch, and underwent strong tectonism movement, magmatism and sedimentation in the Yanshanian movement.Subsequent erosion caused the development of structural windows.It is a large strongly modified syn-collision nappe zone.