Salt Domes
Salt Domes are the result of large deposits of salts laid down millions of years ago and subsequently covered by layers of sediment that in time became stratified rock. Over time the deposits push upwards, as they are usually less dense than the overlying rock, creating domes. Erosion of these domes can produce a feature that has the appearance of a series of concentric circles. These domes can be many kilometres in diameter and in Kazakhstan have been numbered at 1,200.
Salt domes have been recently put forward as an explanation for the circular waterways of Atlantis, as described by Plato. Ulf Richter has proposed(a) that if one such dome had originally been overlaid with strata of varying hardness the effects of erosion could have produced a number of concentric depressions that could have been adapted as canals. Richter provides a diagram illustrating how they are created and giving the Richat Structure in Mauretania as a good example of the process.
Richter outlined this in a paper presented to the 2005 Atlantis Conference [629.451].
The most famous salt dome associated with Plato’s Atlantis is the aforementioned Richat Structure. Despite completely lacking archaeological evidence a number of commentators have enthusiastically embraced the Structure as its location.
However, Ulf Richter has pointed out that it is too wide (35 km), too elevated (400 metres) and too far from the sea (500 km) to be seriously considered the location of Atlantis. The Richat Structure is nearly three thousands miles from Athens, so to suggest that an attack was launched from Mauritania on Greece is simply ludicrous.