The Richat Structure, otherwise called the Eye of the Sahara and Guelb er Richat, is an unmistakable round element in the Sahara desert close Ouadane, west–central Mauritania. This structure is a profoundly dissolved, somewhat curved, 40 km in width arch. The sedimentary rock uncovered in this arch reaches in age from Late Proterozoic inside of the focal point of the vault to Ordovician sandstone around its edges. Uncovered inside of the inside of the Richat Structure are an assortment of meddlesome and extrusive volcanic rocks. They incorporate rhyolitic volcanic rocks, gabbros, carbonatites and kimberlites. The rhyolitic rocks comprise of magma streams and hydrothermally changed tuffaceous rocks that are a piece of two particular eruptive focuses, which are deciphered to be the disintegrated stays of two maars.
