Before Science Could See It: What the Quran Said About Mountains 1,400 Years Ago
Introduction
Consider this: in the 7th century CE, no human being on Earth knew that mountains have roots.
Not the Greeks, with their philosophy. Not the Persians, with their learning. Not the Romans, with their engineering. The idea that a mountain — that towering mass of visible rock — extends downward into the Earth even further than it rises upward into the sky was entirely unknown to every civilization that had ever existed.
And yet, the Quran described it. Not in language that could mean anything. In a single Arabic word — awtād — the Creator described the structure of what He had made. Geologists would spend centuries working toward the same understanding — first proposed as a hypothesis by George Airy in 1855, and only confirmed through seismic survey in the twentieth century.
That is not a coincidence. That is a sign.
Awtād (mountain roots) — The Single Word That Changed Everything
Open Surah An-Naba, the 78th chapter of the Quran, and you will find these Verses:
أَلَمْ نَجْعَلِ الْأَرْضَ مِهَادًا وَالْجِبَالَ أَوْتَادًا
“Did We not make the earth a floor, and the mountains as pegs?”
Surah An-Naba’ 78:6–7
Awtād (أوتاد) means pegs, or stakes. In 7th-century Arabia, every person knew what a tent peg was. You drive it into the ground — the small tip goes in, and then most of the peg disappears beneath the surface. This is the word Allah chose for mountains.
Now ask yourself: why would a man — any man — in 7th-century Arabia reach for that word? Mountains were visible objects. You could see them, climb them, shelter in their shade. Every language on Earth described them as tall things, high things, elevated things. No one described them as things that go down.
There is only one answer that accounts for it: he was told by the One who created them.
What Geology Took Thirteen Centuries to Confirm
For most of human history, science agreed with common sense: mountains were surface features. Tall, yes. Heavy, certainly. But essentially, what you saw was what was there.
Then, in 1855, British scientists conducting geodetic surveys near the Himalayas encountered something that shook that assumption. Their gravitational measurements near the mountains were wrong — significantly, inexplicably wrong. The pull of gravity near those enormous peaks (Himalaya Mountain) was far less than it should have been if the mountains were simply solid masses of rock sitting on the surface.
Two scientists attempted to explain the anomaly (source).
- John Henry Pratt, 1855: proposed that mountains were simply made of lighter rock than their surroundings — surface features of varying density, with no deep downward extension.
- George Biddell Airy, 1855: proposed something far more radical: that mountains, like icebergs, plunge deep below the surface, and that it is this hidden root that explains the gravity deficit. The taller the mountain, the deeper its root.
Science eventually proved Airy right and Pratt wrong. Pratt’s model — mountains as surface-only features with no deep roots — was falsified by the very science that validated Airy’s. The discrepancy the surveys had uncovered went unresolved for nearly a century, until modern seismology and plate tectonics confirmed what Airy had proposed: mountains are not sitting on the Earth. They are embedded in it.
Like icebergs in water, like pegs in the ground, they extend far deeper below the surface than they rise above it. What we see when we look at a mountain is only a fraction of its total structure. The rest — the root — is hidden inside the Earth, pushing down into the mantle, providing the buoyancy and stability that allows the mountain to stand.
This is now established, measured, and confirmed science. Mountains are not simply masses of rock sitting on the surface — they are deep structural anchors driven into the Earth. For mountains resting on denser mantle rock, approximately 85% of the mountain’s total mass lies hidden below the surface, invisible to the naked eye. Their roots extend on average 5.6 times the visible height of the range downward into the Earth’s interior. University of Wisconsin geologists (source), calculating from standard crustal density (2.8 g/cm³) and mantle density (3.3 g/cm³), confirm that a mountain standing just 3 miles high drives a root nearly 17 miles deep into the mantle beneath it.
The word science now uses for these underground extensions? Roots. Anchors. Pegs.
Pratt, with all the instruments of 19th-century science, described mountains without roots. He was wrong. Airy described mountains as deep-rooted structures driven into the Earth. He was right.
Two scientists. Same era. Same instruments. One correct, one incorrect. And it took the full weight of modern seismology, gravity surveys, and computational geophysics to finally settle the question and confirm what Airy suspected — that mountains are not surface features. They are pegs, driven deep into the Earth, with most of their mass hidden below the surface, anchoring the crust above.
How was any of this known in the 7th century? There were no seismographs. No gravity surveys. No density measurements. No concept of crustal isostasy. The desert Arabs of that era knew mountains as what they could see — rock, height, permanence. They had no instruments, no institutions, no scientific tradition that could have arrived at this conclusion. Yet the Quran — revealed in the 7th century CE — used the word awtād: pegs. Not hills. Not formations. Pegs — a word that by its very nature implies something driven into a surface, with most of its length concealed beneath it.
Pratt arrived at his conclusion in 1855 and was wrong. Airy arrived at his in 1855 and was right. The Quran arrived at its description in the 7th century CE — more than twelve hundred years before either of them — and used a single word that captured the reality both men were struggling to understand.
So it does not shake with you
The description of mountains as pegs is remarkable on its own. But the Quran goes further — it explains why mountains exist in this form.
وَأَلْقَىٰ فِي الْأَرْضِ رَوَاسِيَ أَن تَمِيدَ بِكُمْ
“And He has placed into the earth firm mountains, so it does not shake with you………”
— Surah An-Nahl 16:15
The Arabic word tamīda means to sway, to rock, to move unsteadily — like an unstable surface underfoot. The Quran states clearly: the mountains were placed to prevent this. They are not decorative. They are not incidental. They are functional anchors holding the Earth’s surface stable.
Without these anchors, plate movement would be more rapid, more violent, more destructive.
The Quran told us this 1,400 years before we had the instruments to measure it.
How Mountains Are Built — and Why They Stand
Modern geology has revealed that mountains are far more complex than their visible peaks suggest. When two continental plates collide, the crust — normally about 40 km thick — is compressed and thickened to between 48–89 km. This thickening does not only push upward to form the peaks we see. Crucially, it also drives a deep root of lighter continental rock downward into the denser mantle below.
This root behaves exactly like the submerged base of an iceberg. Because the crustal root is less dense than the surrounding mantle rock — granite at approximately 2.8 g/cm³ against mantle rock at roughly 3.3 g/cm³ — it generates an upward buoyant force. The deeper the root, the higher the mountain it supports above. The mountain does not simply sit on the Earth. It is embedded in it, anchored from below, floating in equilibrium on the mantle beneath.
This deep root is not passive. It actively stabilizes the lithospheric plates around it, dampening tectonic movement and maintaining the equilibrium that keeps the Earth’s surface from violent, unceasing upheaval. The mountain stands because of what is hidden beneath it — and the Earth is held stable because the mountain stands.
This is precisely what the Quran described as awtād — pegs. Not a surface feature. Not merely something tall. Something driven deep, anchored below, holding everything above it in place.
Science did not create the mountains. Science did not anchor them. Science only discovered what was already there — the roots, the balance, the precise equilibrium between crust and mantle that holds the Earth stable beneath our feet. What took humanity two centuries of instruments, surveys, and calculation to confirm, the Quran stated in a single word, in the 7th century, to a people who had never heard of isostasy.
أَلَمْ نَجْعَلِ الْأَرْضَ مِهَادًا وَالْجِبَالَ أَوْتَادًا
“Did We not make the earth a floor, and the mountains as pegs?”
Surah An-Naba’ 78:6–7
The Alps: A Modern Confirmation Carved in Data
The image above is not an illustration or a diagram drawn to support a theory. It is a measured, seismically verified map — produced in 2023 by a team of researchers from across Europe using data from over 600 broadband seismometers deployed across the Alpine region. What it shows is the actual depth of the Moho, the boundary between the Earth’s crust and the mantle below, measured kilometer by kilometer beneath the European Alps. (Source)
The pattern it reveals is unambiguous: the deepest roots lie directly beneath the highest mountains. (look on the provided picture)
Where the Alps rise to their greatest heights — at the collision zone between the European and Adriatic tectonic plates — the crustal root plunges to depths exceeding 50 kilometers below the surface. The mountain and its root are one structure. What you see above is inseparable from what is hidden below.
The researchers confirmed this with extraordinary precision. Using seismic waves from 1,687 earthquakes recorded across the network, they were able to image the crust-mantle boundary in three dimensions beneath the entire Alpine region — producing over 112,000 high-quality measurements. The result is not a model or an estimate. It is a detailed map of what is actually there, beneath the mountains, invisible to the human eye, confirmed by the most advanced geophysical tools humanity possesses.
And what it shows is a peg.
A structure with its greatest mass below the surface. A structure whose depth is proportional to its height. A structure that anchors the lithospheric plates and prevents the kind of violent, rapid movement that would otherwise shake the Earth beneath our feet — exactly as the Quran described it, in a single word, fourteen centuries before any seismometer existed:
أَلَمْ نَجْعَلِ الْأَرْضَ مِهَادًا وَالْجِبَالَ أَوْتَادًا
“Did We not make the earth a floor, and the mountains as pegs?”
Surah An-Naba’ 78:6–7
The Question That Cannot Be Avoided
Let us pause and consider what the historical record actually tells us.
The Prophet Muhammad ﷺ was born in Mecca in 570 CE, in a society that had no geological instruments, no framework of plate tectonics, no seismographs, and no scientific tradition concerned with the internal structure of mountains. This is not a criticism — it is simply the historical reality of 7th-century Arabia, as it was for every civilization on earth at that time.
Yet the Quran describes mountains as having deep anchoring structures driven into the earth — a reality that geologists did not begin to theorize until the late 19th century, and did not confirm through physical measurement until the mid-20th century.
The question this raises is worth sitting with honestly: how do we account for this?
This is one data point among several. Similar observations have been made regarding the Quran’s descriptions of embryonic development, the behavior of deep ocean layers, the expanding universe, and other others. Each of these, taken alone, might invite skepticism. Taken together, they form a pattern that is difficult to deny. It is an invitation to reflect — as the Quran itself repeatedly asks us to do.
Reading the Words Is the First Step — Reciting Them With Mastery Is the Path
A single word — awtād — carried a meaning that took geology fourteen centuries to confirm. That’s the kind of precision built into every letter of the Quran. But precision like that only reveals itself to those who can recite the text correctly, hold it in memory, and return to it again and again — not just glance at a translation once.
This is what Tajweed is for: learning to pronounce each letter and word the way it was revealed, so nothing is lost or distorted in your recitation. It’s what Hifz is for: carrying these verses with you permanently, in your memory. And for students who want to go deeper into the meaning behind a verse like the one on mountains, our teachers are also happy to walk through tafsir alongside you.
At Luqman Institute, we offer one-on-one classes in Tajweed, Hifz, and Ijazah certification, with qualified teachers guiding you at your own pace.
Start with a free trial class and experience what focused, personal Quran instruction feels like — no pressure, no commitment.
Whatever errors or lapses occurred in this work are from me and from Satan, and Allah and His Messenger are free from them. I remind you yet I myself forget, and we ask Allah for guidance, pardon, and well-being.