Science:
Mountains are shaped like pegs; they have underlying roots deeply embedded in the ground which can reach several times their height.

Islam:
Quran 78:6-7 --> "Have we (God) not made the Earth as a bed, and mountains as pegs?"

And another one about mountains:

Science:
Modern theory of plate tectonics: mountain work as stabilizers for the Earth. (Professor Emeritus Frank, president of the National Academy of Sciences, Washington D.C.)

Islam:
Quran 16:15 --> "And He (God) has set firm the mountains in the Earth so that it would not shake..."