Smoothes rocks

Weathering & Erosion

Friction between the stationary rocks and the moving water and sand smoothens the surface of the rocks.

Weathering and erosion slowly chisel, polish, and buff Earth's rock into ever evolving works of art-and then wash the remains into the sea.

The processes are definitively independent, but not exclusive. Weathering is the mechanical and chemical hammer that breaks down and sculpts the rocks. Erosion transports the fragments away.

Working together they create and reveal marvels of nature from tumbling boulders high in the mountains to sandstone arches in the parched desert to polished cliffs braced against violent seas.
National Geographic, Erosion and Weathering, 2019

The friction smoothes and polishes the rocks. This was known recently, however this was portrayed in the Quran 1400 years before it was discovered.

[Quran 2:264] O you who believe! Do not nullify your charitable deeds with reminders and hurtful words, like him who spends his wealth to be seen by the people, and does not believe in Allah and the Last Day. His likeness is that of a rock covered with sand, a downpour strikes it, and leaves it smooth. They gain nothing from their efforts. Allah does not guide the disbelieving people.

"Safwan صَفْوَانٍ" is type of rock. "Saldan صَلْدًا" means smooth. In this verse rainwater and sand smoothes the rock. Today we know that friction between the stationary rocks and the moving water and sand smoothes the surface of the rocks.

How could an illiterate man who lived 1400 years ago have known that how to smoothen rocks?  

Miracles Of Quran

The Quran (Koran, the book of Islam) contains scientific knowledge that could not have been known 1400 years ago. It ranges from basic arithmetics to the most advanced topics in astrophysics. You are invited to go through those miracles and judge for yourself.

STUDY OF THE EARTH

Geology

Coal, Landslide, Weathering - Erosion, Porous Rocks, Mass Extinction, Steam Explosions, Mountains, Internal Waves, Earth, Pumice, Photic Zone, Tectonics, Dead Sea, Sinkhole, Volcano, Shorelines, Minerals, Hydrothermal Vents, Freshwater, Fire Whirl, Rocks Crack, Subduction, Fault Lines, Earthquake, Soil Expansion, Flash Flood.

SCIENCE OF LIVING ORGANISMS

Biology

Fetal Development, Honey, Cholesterol, Meiosis, Antioxidants, Fats, Hypoxia, Miscarriage, Gardens, Photosynthesis, White Hair, Pollination, Lightning Strike, Inner Ear, Cataracts, Vision, Bones, Milk, Brain Functions, Evolution, Honey Bees, Human Senses, Frost, Gender, Eye Pupil, Womb, Fingerprints, Skin Nerves, Fasting, Breastfeeding, Eardrum, Fetus, Fluorescence, Human Embryo, Bedsores, Perspiration, Bacteria, Plant Stress.

SCIENCE OF Quantity, SPACE, AND CHANGE

Mathematics

Distance, Prime Numbers, Pi, Arithmetics, Relational Algebra, Base-19.

study of the past

History

Paper Money, Hieroglyphs, Digital Books, Calendar, Moses, Pharaoh's Mummy, Haman, Karnak Temple, Pharaoh, Flight, Noah, Dead Sea, Pompeii, North, Petra, Water Dam.

ANIMAL SCIENCE

Zoology

Raptors, Spider Web, Ants, Honey Bees, Colonies, Animal Languages, Mosquito, Crow, Nocturnal Animals, Housefly.

STUDY OF THE ATMOSPHERE

Meteorology

Sea Breeze, Orographic Effect, Wind, Volcanic Gases, Mass Extinction, Microburst, Cloud Seeding Dew, Shorelines, Fire Whirl, Freshwater, Atmospheric Pressure, Flash Flood, Weight Of Clouds.

SCIENCE OF CELESTIAL OBJECTS

Astronomy

Sunlight, Full Moon, Meteorites, Exoplanets, Planetary Orbits, Magnetosphere, Moonlight, Day, Multi-Star System, Iron, Starlight.

SCIENCE OF ELEMENTS AND COMPOUNDS

Chemistry

Viscosity, Superionic Water, Photosynthesis, Volcanic Gases, Mass Extinction, Bones, Steam Explosions, Internal Waves, Pyramids, Hydrogen, Water Stratification, Cloud Seeding, Fluorescence, Pompeii, Rust.

SCIENCE OF MOTION AND BEHAVIOR THROUGH SPACE AND TIME

Physics

Work, Light, Atoms, Pairs, Speed Of Light, String Theory, Rayleigh Scattering, Terminal Velocity, Time Relative, Wormholes, Pulsars, Gravity, Spacetime, Armor Peircing, Gravitational Waves, Sonic Weapons, Mass, String Theory, Equivalence Principle, Red Shifting.

SCIENCE OF THE ORIGIN AND EVOLUTION OF THE UNIVERSE

Cosmology

Shape Of Universe, Age Of Universe, Seven Heavens, Big Bang, Expanding Universe, Sound Waves, Isotropy, Primordial Smoke, Dark Energy, Galaxy Filaments. Dark Energy

Please link to

miracles-of-quran.com