Ришат или Глаз Сахары Мавритании

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On the territory of modern Mauritania, the largest desert in the

On the territory of modern Mauritania, the largest desert in the

world hides an amazing natural phenomenon of the Proterozoic period, whose name is Rishat or the Eye of the Sahara.
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This object has an incredibly huge size (up to 50 kilometers

This object has an incredibly huge size (up to 50 kilometers

in diameter), so it can be seen even from space. The structure consists of several ellipsoid rings formed by sedimentary rocks and sandstones about 500 million years ago.
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The eye of the Sahara is thought to have formed between

The eye of the Sahara is thought to have formed between

the late Proterozoic (2.5 billion years) and Ordovician (480 million years). The oldest ring is about 600 million years old.
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The original version of the origin as a result of a

The original version of the origin as a result of a

collision with a meteorite was later replaced by a version of the completely geological origin of these concentric circles.
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The Rishat structure can change color at different times of the

The Rishat structure can change color at different times of the

day, due to the effect of heat emission. Cosmonaut Valentin Lebedev, observing the structure on Board the Salyut-7 station on October 24, 1982, compared it to a child's pyramid of colorful rings.