Subduction Zone
Veteran Member
I don't really have a dog in this fight, but these places don't necessarily have to have existed at all.
They probably didn't. I have seen the "evidence" for them. The examples that I saw were laughable. Natural geologic formations were called "city walls". and the presence of sulfur in sediments that naturally have sulfur in them (the highly saline deposits on flood plains of the Dead Sea" were claimed to be from "brimstone". If one does any background study at all the "finds" become pathetic.