What is sand? Detailed answer

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What is sand? Detailed answer

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What is sand?

When a solid rock was exposed to wind, rain, and frost, it would break into small pieces. If these particles are small enough (from 0,05 mm to 2,5 mm in diameter), they are called sand. Since sand is the small particles of minerals that make up mountains, any minerals can be found in the sand.

The main material of which sand is composed is quartz. Some sands contain 99% quartz. Other minerals that can be found in the sand are calcite, mica, iron ore, in small quantities - garnet, tourmaline, topaz.

Sand can be found wherever mountains are exposed to nature. One of the places with the greatest occurrence of sand is the seashore. Here the impact of the tides, their destructive effect on the mountains, the friction of the applied sand on the mountains and the dissolution of some mountain minerals with salt water affects. All this together contributes to the formation of sand. But where do the sands in the deserts come from? Much of the sand is blown into the desert.

In some cases, desert sand is formed by the destruction of mountains. There are cases when deserts were originally the seabed, but millennia ago the water receded. Sand is a very useful material. It is used in the manufacture of concrete, glass, sandpaper, filters for water purification.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Did Gogol gogol?

About a person walking in a cheerful and valiant manner, or about a loafer proudly strolling, they can say: he walks like a gogol. The writer Nikolai Vasilyevich has nothing to do with it - such behavior was not at all in his character. Gogol is also a bird of the duck family, the manner of walking of which became the reason for the comparison.

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