Allah's Scientific Miracles in the Quran. The Quran draws attention to a very important geological function of mountains:

We placed firmly embedded mountains on the Earth, so it would not move under them... (Quran, 21:31)

The verse states that mountains perform the function of preventing shocks in the Earth. This fact was not known by anyone at the time the Quran was revealed. It was, in fact, brought to light only recently, as a result of the findings of modern geological research.