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2 places to sift through. Narrow by kind, country, period or how firmly each one is established — contested and pseudoarchaeological claims are labelled here, never hidden.
🇲🇷 Mauritania · Submerged site
Pseudoarchaeology (2018–present) · Pseudoarchaeology (Richat extension)
Second Richat Semsiyat dome pseudo-harbour at 400 m asl – sandstone dome fracture south of main eye.
🇲🇷 Mauritania · Natural formation
Cretaceous 100 Ma formation; Atlantis proposed 9600 BCE · Natural geological; Atlantis = Plato allegory @ 360 BCE
Concentric circular erosional dome in Sahara (100 Ma igneous intrusion) promoted since 2018 YouTube as Atlantis capital matching Plato's ringed city.
