يَوْمَ تَرْجُفُ الْأَرْضُ وَالْجِبَالُ وَكَانَتِ الْجِبَالُ كَثِيبًا مَّهِيلًا (14)
(73:14) (They will come across all this) on the Day when the earth and the mountains shall tremble violently and the mountains shall crumble into heaps of scattered sand. *14
*14) Since at that time the cohesive force to bind the parts of the mountains together will cease to work, first they will become like crumbling dunes of fine sand, then because of the earthquake which will be shaking the earth; the sand will scatter and shift and the whole earth will turn into an empty level plain. This last state has been described in Ta Ha: 105-107, thus: "They ask you: where will the mountains go on that Day? Say: My Lord will reduce them to fine dust and scatter it away. He will turn the earth into an empty level plain, wherein you will neither see any curve no crease."