Lushan Mountain was formed during the Cretaceous Yanshan Movement, when geological subsidence formed the valley basin in the lower reaches of the ancient Ganjiang River. With the passage of time, this basin has experienced several glaciers and snow, forming the magnificent scene of Lushan Mountain today.
The formation of Poyang Lake is closely related to Lushan Mountain. Tens of thousands of years ago, at the end of the recent sub-glacial period, the Lushan fault block rose and stood on the edge of the basin, making the basin a huge lake. Rivers that were originally in the basin, such as Ganjiang River, Fuhe River, Xinjiang River, Raohe River and Hexiu River, all poured into this lake, forming the Poyang Lake we see today. Therefore, it can be said that Poyang Lake is closely related to Lushan Mountain.
At the same time, due to the geographical proximity of Lushan Mountain and Poyang Lake, their formation and existence also influence each other. Lushan Mountain is one of the important water sources in Poyang Lake basin, and its rich water resources have an important impact on the water quantity and quality of Poyang Lake. Poyang Lake is one of the largest freshwater lakes in China, and its water area and volume are also influenced by Lushan Mountain. Therefore, Lushan and Poyang Lake are very closely linked.