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Book 16, Question 11 · Video

Why Do Desert Rocks End Up in Strange Wind-Carved Shapes?

Video · 1:56 · Crafty Clover explains, from A Million Whys Book 16

Wind carries sand that acts like natural sandpaper, and it slowly carves rocks into strange shapes! Softer layers wear away faster than harder ones. Over thousands of years, that l

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do desert rocks end up in strange wind-carved shapes?

The Big Idea

Wind carries sand that acts like natural sandpaper, and it slowly carves rocks into strange shapes! Softer layers wear away faster than harder ones. Over thousands of years, that leaves grooves, pedestals, and fins.

Sand Sandpaper

Step one: sand works like sandpaper. Wind lifts sand grains and blasts them against rock. Most sand bounces near the ground, so the rock gets scrubbed most down low.

Soft Wears Faster

Step two: soft layers wear away faster. Rock is made of layers, and some are softer than others. The soft layers disappear first, and the hard layers are left standing.

Strange Shapes

Step three: strange shapes appear. After thousands of years, you can see grooves, pedestals, and fins. Mushroom-shaped rocks have a thin neck and a wide cap, and they are a classic result.

A Closer Look

Let's take a closer look! Blowing sand scrubs the rock. Softer layers wear away faster. A mushroom rock gets a thin neck and a wide cap. All of this takes thousands of years. Wind is a patient artist.

Quick Facts

Quick facts! Wind-carved ridges in the desert are called yardangs. They often line up in the direction of the wind. Some are as long as a football field. Look at rock shapes from a safe spot, and never climb on fragile rocks.

Think Like a Scientist

Now, think like a scientist! Rub a bar of soap with a rough sponge. Then rub another spot with a soft cloth and compare. Rough scrubbing wears the surface faster. That is just like blowing sand.

Outro

Blowing sand sculpts desert rocks into strange shapes. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

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