The Richat Structure or Eye of the Sahara or Earth


richat structure

eye of the sahara

eye of the earth

eye of mauritania

eye of the sahara

The Richad Structure video is in french but the pictures are awesome

Eye of the Sahara ? Mauritania

The Eye of the Sahara is a magnificent landform located in the southwestern area
of the Sahara desert. Geologists originally thought the formation was crated when
a meteorite hit the earth, but now believe it was caused by erosion. Still, the
massive 30 mile diameter and the fact that it has a circular shape makes the formation
quite a mystery.

This spectacular landform in Mauritania in the southwestern part of the Sahara desert
is so huge with a diameter of 30 miles that it is visible from space. Called
Richat Structure --or the Eye of the Sahara-- the formation was originally thought to
be caused by a meteorite impact but now geologists believe it is a product of uplift
and erosion. The cause of its circular shape is still a mystery.

The part of the sedimentary rock corresponding to the white of the eye is a plateau
standing some 200 m above the sand desert. The Richat Structure corresponding to the
iris of the eye lies in a depression, and the peak of the outer rim is 485 m above sea
level. The Richat Structure consists of Early Paleozoic rocks, some 600 million years old.
Around the center, rocks resistant to weathering and erosion (purple and blue-green part)
make 100 m high ridges, and nonresistant rocks (yellow and brown part) form valleys. These
features alternate and are concentric.


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