I think Dr Farrell has a book on the nazis and antarctica. I still need to get that one.
From what i’ve gathered, Eden had four rivers and is located when following the North star. The swastika could be a memory from humanity’s fall from Eden. Given all the talk about the icecaps melting one day, and nazi expedition in the North pole. Plus the legends about the expedition having uncovered a black rock there.
Atlantis is not Eden, they have different descriptions. Maybe the richat is indeed the location where Atlantis was. I am speculating a lot here.