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NASA satellite images of the Richat Structure.

About the Richat Structure:

The Richat Structure, also known as the Eye of the Sahara and Guelb er Richat, is a prominent circular feature in the Sahara desert of west–central Mauritania near Ouadane. This structure is a deeply eroded, slightly elliptical, 40-km in diameter, dome. The sedimentary rock exposed in this dome range in age from Late Proterozoic within the center of the dome to Ordovician sandstone around its edges.

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  12. kevie19700 reblogged this from staceythinx and added:
    Excellent series of photographs regarding this most interesting geologic structure. Thanks for posting!
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    There’s part of me that is kind of surprised no one has used this thing as the central location or plot device for some...
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