Atlantis has been discovered?!

originally posted by: bloodymarvelous
You know? I just realized I was wrong. If the outermost ring of the Richat is used as the outer ring....... which it probably should be. Then we have this passage:

Leaving the palace and passing out across the three (117e) you came to a wall which began at the sea and went all round: this was everywhere distant fifty stadia from the largest zone or harbour, and enclosed the whole, the ends meeting at the mouth of the channel which led to the sea. The entire area was densely crowded with habitations; and the canal and the largest of the harbours were full of vessels and merchants coming from all parts, who, from their numbers, kept up a multitudinous sound of human voices, and din and clatter of all sorts night and day.

A kilometer is approximately 5 stadia. If the "largest zone" means the wall that was 3 stadia thick in this part:;

Now the largest of the zones into which a passage was cut from the sea was three stadia in breadth, and the zone of land which came next of equal breadth; but the next two zones, the one of water, the other of land, were two stadia, and the one which surrounded the central island was a stadium only in width. (116a) The island in which the palace was situated had a diameter of five stadia.

Then from the center of the island in the center, we have 2.5 stadia (island itself) + 1 (moat around island) + 2 (ring around that moat) + 2 (moat) + 3 (zone of land) + 3 (passage cut from sea) = 13.5 stadia or let's call it 2.5 kilometers.

From that point, another 50 stadia (or 10 km) to the outer edge. Grand total of 63.5 stadia, or 12.5 km.

On the map, the Richat structure has a diameter of 23 km. Or a radius of 11.5 km.

That's actually pretty close to correct.

Good attempt but the Greek unit of measurement, the stade, the distance covered in the original Greek footraces (about 600 feet [180 metres]) so 5 x 180 equals 900.

This structure also measures 45 kilometers (28 miles) across (diameter) and is made up of igneous and sedimentary rocks. So the radius would be 22.5 kilometers. (some sources say It is 40 kilometres (25 mi) in diameter,

earthobservatory.nasa.gov...