江山大峡谷底部是蜿蜒的铜钵溪，大峡谷的一侧崖壁就是总长约1000多米，相对高差300余米，坡度大于80°的大绝壁，犹如大自然竖起的一道“天然屏障”。地质学家实地考察证实，这道“天然屏障”的展布主要受岩石中发育的节理控制，其形成则是风化剥蚀、流水侵蚀和重力崩塌作用的共同结果。 At the bottom of Jiangshan Valley is a winding Tongboxi Creek. The cliff on one side of the valley is over 1000 meters in length, with a relative height difference of more than 300 meters, and a gradient of more than 80 degrees, just like a "natural barrier". According to the field investigation of geologists, the distribution of this "natural barrier" is mainly limited by the joints developed in the rock, and its formation is the common result of weathering and erosion, water erosion and gravity collapse.