After carefully observing the rock stripes in Enshi Grand Canyon, experts found that these stripes are alternately composed of hard chemical deposits easily dissolved by water and relatively soft sandy deposits easily dissolved by water. "Because sand and gravel are first dissolved under the scouring of water, cracks will appear between rock layers. However, these cracks are not neat. Under the action of gravity, the rocks above will lose their balance, tilt and collapse. " Wan Xinnan said