Intersecting the mountains are numerous ravines and passes.
The terrain was rough, covered with brush choked ravines and sharp granite bluffs.
The glaciers also attain a greater development in the western portion of the Nan-shan, but the valleys are dry, and the slopes of both the mountains and the valleys, furrowed by deep ravines, are devoid of vegetation.
The face is scored with ravines, a particularly deep cleft, known as The Gorge, affording the shortest means of access to the summit.
The vegetation in the marshy bottoms of the ravines and in the valleys of the streams and rivers is totally different.