这些被称为“叶状陡坡”的有趣的地貌特征是在月球一度熔化的内核开始冷却的过程中形成的断层，这一过程使得月球表面发生收缩，并出现褶皱。
The intriguing features , called lobate scarps , are created when the Moon 's once-molten interior began to cool , causing the lunar surface to contract and then crinkle , they said .
月球内核