noun
mountain folds; folds of a mountain
Refers to the creases or ridges on a mountain's surface, often used in geographical or descriptive contexts.
遠くの山襞が夕日に照らされて美しかった。
The folds of the distant mountain were beautifully lit by the evening sun.
地図で山襞を読み取るのは難しい。
It's difficult to read the mountain folds on a map.
Compound of 山 (mountain) and 襞 (fold/crease). The word is straightforward and transparent.