rhamphotheca:

Eye of the Sahara, Mauritania, Africa
The Eye of the Sahara in Mauritania, also known as the Richat Structure, resembles a bull’s-eye 30 miles (50 kilometers) wide. The mysterious formation is large enough for early space missions to have used it as a landmark. Scientists think it is the result of uplifted earth worn down over time by wind and water, with different rates of erosion on the varying rock types forming concentric ridges.
(via: OurAmazingPlanet)       (photo: ESA/NASA)
Junio 07 201206·13 pm112 notas

rhamphotheca:

Eye of the Sahara, Mauritania, Africa

The Eye of the Sahara in Mauritania, also known as the Richat Structure, resembles a bull’s-eye 30 miles (50 kilometers) wide. The mysterious formation is large enough for early space missions to have used it as a landmark. Scientists think it is the result of uplifted earth worn down over time by wind and water, with different rates of erosion on the varying rock types forming concentric ridges.

(via: OurAmazingPlanet)       (photo: ESA/NASA)

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