冰川作用
The main type of debris flow occurs in gulch by rainstorm, a small amount occurs on slope by rainstorm, and some others are coursed by glacial action.
泥石流以暴雨沟谷型泥石流为主,可见少量暴雨坡面型泥石流及古冰川泥石流。
There were evidences of glacial action on the rocks.
这些岩石上有冰河留下的痕迹.
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