Studies on geometry and mechanism of folds show that it is base faults and fault blocks that control foldings in unconsolidated sediments on the SHS shelf.

• 复合作用褶皱.；对褶皱的成因和几何形态的研究表明；控制未固结沉积物中褶皱形成的因素是基底断层及其形成的断块；而不是区域应力场