Sand
The wind originates in the Sahara Desert.
The process is called deflation and the product is called desert pavement.
I'm pretty sure its the wind that blows the sand which causes it to rub and erode.
desert pavement
It blows the sand aroud. Or the water can wash it away. Such as a sand storm.
It's a hot dry north wind which blows out of the Sahara desert towards countries on the Guinea coast.
When wind blows sand, it is called a sandstorm. Sandstorms can occur in desert regions where loose sand is easily picked up by strong winds, creating a phenomenon that can reduce visibility and impact the environment.
The sand in the desert is usually quite dry and has few plants to hold the soil in place. Therefore, when the wind blows it is able to lift the sand and dust into the air forming a dust storm.
The otherway around, a desert can be a type of terrain.
ordos desert
sandstorms occur when windstorms happen in a dry desert area which picks up dirt and sand and blows all over the place
desertification of the gobi desert started to happen around 3823 around noon.