褶皱山（folded mountain）是地壳运动形成的褶皱岩层所组成的山体。是地表岩层受水平方向的构造作用力而形成岩层弯曲的褶皱构造山地。褶皱又称褶曲，根据褶皱的形式，褶皱山分为单背斜形成的褶皱山(中国重庆附近的歌乐山)、多褶皱山(如法、瑞交界的侏罗山)、褶皱推覆体山(如阿尔卑斯山)等。
第三种类型的山可能是由于火山活动形成的，一般发生在活动性褶皱带地区，如北美西部的喀斯喀特山脉。
A third type of mountain may be formed as a result of volcanic activity which occurs in regions of active fold mountain belts, such as in the Cascade Range of western North America.
角度不整合是板内褶皱造山变形，平行不整合是板内造陆变形的重要记录。
Angular unconformity belongs to an intraplate folded - orogenic deformation. Parallel unconformity is the record of intraplate epeirogenic deformation.
在中生代，苏鲁元古褶皱带受造山作用的影响活化，导致许多花岗岩体的侵入，使交代岩广泛发育。
In Mesozoic, the Proterozoic Sulu fold belt has undergone orogenic activization resulting in the intrusion of numerous granite bodies with broad development of metasomatic rocks.
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