The Richat Structure is a deeply eroded, slightly elliptical dome with a diameter of 40 kilometres (25 mi). The sedimentary rock exposed in this dome ranges in age from Late Proterozoic within the center of the dome to Ordovician sandstone around its edges.

The Richat Structure is a large geographic feature with concentric rings located in the Sahara near Ouadane, Mauritania. It is an uplifted geological dome formed by molten rock during the Cretaceous Period.

2024年5月31日 · The "Eye of the Sahara" — also known as the "Eye of Africa" or the Richat structure — is a giant rock dome, carved with concentric rings, that looks like a giant bullseye when seen from above.

2024年3月15日 · Known as the Richat Structure — or, more commonly, the Eye of the Sahara — this massive geological formation resembles a giant eye. Consisting of a series of rings on the Adrar Plateau, a prominent feature in northwestern Mauritania, the structure measures 31 miles (50 km) in diameter, making it highly visible even from high above Earth .

理查特結構 （英語： Richat Structure 、阿拉伯語： قلب الريشات ‎， 羅馬化：Qalb ar-Rīšāt），又稱 撒哈拉之眼 （英語： Eye of the Sahara），是一個位於 撒哈拉沙漠 西部、 茅利塔尼亞 境內的巨大 同心圓 地形。 理查特結構的直徑有50公里， 海拔 高度約400公尺，整體相當平坦；看起來就像個 菊石，從繞地球軌道才得見其全貌。 一開始理查特結構被認為是個 隕石坑，但構造的中心地勢平坦，沒有發現曾有高溫與撞擊的地質證據；也不太可能是 火山，因為當地沒有發現 火成岩 堆 …

2023年1月16日 · The Eye of the Sahara, also known as the Richat Structure, is a large, circular geological formation in the Sahara Desert of Mauritania. It spans an impressive 50 kilometers (30 miles)...

2023年6月5日 · The Richat structure, popularly known as the eye of the Sahara, is a striking, symmetrical, slightly elliptical geologic feature. It has concentric rings and measures about 25 miles (40 kilometers). This unique geologic feature visible from space is in central-west Mauritania’s Sahara Desert. What is it?

2024年7月30日 · The Eye of the Sahara, also known as the Richat Structure, is a geologic dome containing rocks that predate the appearance of life on Earth. The Eye resembles a blue bullseye and is located in Western Sahara. It is visible from space and …

2024年2月21日 · The symmetrical geological marvel in the Adrar Plateau, a rocky, isolated region in Mauritania, is known as the Eye of the Sahara or, more recently, the Richat Structure. Initially believed to be an impact structure resulting from a meteor, subsequent studies established its true nature as an uplifted geologic dome.

The Richat Structure of Mauritania has captured the attention of astronauts for about as long as NASA has sent humans into orbit around Earth. This circular geologic feature is thought to be caused by an uplifted dome—geologists would classify it as a domed anticline—that has been eroded to expose the originally flat rock layers.