The surface of the earth is broken into many rigid plates that are about 100 km in thickness. These plates float on a partially molten region called aesthenosphere.

Mountain formations occur at the boundary of the plates. The earth’s crust is 5 km thick below oceans, about 35 km thick below flat continental surfaces and almost 80 km thick below great mountain ranges. These are the strong foundations on which mountains stand. The Qur’an refers to the strong mountain foundations in the following verse:

Thus, the information contained in the Glorious Qur'an about the nature of mountains, is in perfect agreement with recent discoveries in geology.