Скачать или смотреть The Richat Structure — Stratigraphic Dome with Persistent Radial Symmetry

Forty kilometers wide. Visible from orbit.

The Richat Structure, also known as the Eye of the Sahara, is a massive circular geological formation in Mauritania’s Adrar Plateau. Originally suspected to be an impact crater, field surveys found no confirmed shock quartz or meteoritic residue. Stratigraphic evidence supports a deeply eroded structural dome with igneous intrusion and hydrothermal alteration dating to the Cretaceous period.

Data Log
Location: Adrar Plateau, Mauritania
Diameter: ~40 kilometers
Initial orbital documentation: 1960s space missions
Early hypothesis: Impact crater
Impact evidence: No confirmed shock metamorphism
Current classification: Eroded structural dome
Associated activity: Cretaceous igneous intrusion (~100 million years ago)
Unresolved factor: Preservation of large-scale radial symmetry under prolonged erosion

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