The Richat Structure or Guelb er Richat in Mauritania was thought by many to be an impact crater until it was identified as a possible ‘salt dome’(a). The concentric circles of which the structure is composed was clearly revealed by satellite imagery. It did not take long before it was being compared to Plato’s description of Atlantis. However, Ulf Richter has pointed out that it is too wide (35km), too elevated (400metres) and too far from the sea (500km) to be seriously considered as the location of Atlantis. Nevertheless, researchers such as Robert deMelo are still prepared consider it a possible location candidate(b).

50km west-southwest of Richat is a similar though smaller feature, the Semsiyat Dome, having a diameter of 5km.

2011 saw a futher development of the idea that Atlantis had been located at Richat
by George S. Alexander and Natalis Rosen on their website^(c). A one hour video in support of their thesis can be freely downloaded from the site^(d).

(a) http://www.atlantis-schoppe.de/richter.pdf
(b) http://www.gpofr.com/documents/2012Atlantis.pdf

^(c) http://visitingatlantis.com/
^(d) http://visitingatlantis.com/Movie.html