The Arabic preposition 'fee' (فِي, inside) in a verse about mountains suggests formations within the Earth, confirmed by modern seismic imaging.
Al-Anbiya
Verse 31
وَجَعَلْنَا فِي الْأَرْضِ رَوَاسِيَ أَنْ تَمِيدَ بِهِمْ وَجَعَلْنَا فِيهَا فِجَاجًا سُبُلًا لَعَلَّهُمْ يَهْتَدُونَ
"And We placed in earth mountains, lest it sways with them, and We placed therein signposts and passages, that they may be guided."
The Arabic preposition fee (فِي) means inside, not on top of. Modern geology has confirmed mountain-like formations hundreds of miles beneath the surface, with peaks reaching 40 miles high, that stabilise the mantle layer above them. Nothing on the surface gives any hint they exist. They were only discovered through seismic tomography in the 20th century. The Quran describes mountains anchored inside the Earth, and they are.
Prepositional analysis of 'fee' (in/inside) in Quranic Arabic, cross-referenced with seismic tomography findings on mantle structure.
The internal mountain interpretation is less common in classical tafsir; the stabilising function of mantle features was only confirmed through seismic imaging technology.
Milestone Illuminated
First Light
Discovery
Discover your very first reflection. Every universe begins with a single point of light.