为岩体经构造运动抬升，在风化、侵蚀作用下形成的石峰间的狭窄裂隙，是峡谷形成的最初阶段。不足一米宽的石缝下则是万丈深渊，令人望而却步，胆战心惊，又称“一步难行”。The rock strata was uplifted by tectonic movements, and formed this narrow gap between two peaks under the effect of weathering and erosion. It is the initial stage of the formation of a valley. Under the gap that is no wider than 1m there is a scaring bottomless chasm, so this site is called the Scaring Gap.